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Abelia × grandiflora (Glossy Abelia)
Abelia × grandiflora 'Edward Goucher' (Edward Goucher abela)
Abelia × grandiflora 'Kaleidoscope' (Kaleidoscope Abelia)
Abelia grandiflora 'Kaleidoscope' (Kaleidoscope Glossy Abelia)
Abelia × grandiflora 'Sunrise' (Sunrise Glossy Abelia)
Abelia spp. (Abelias)
Abeliophyllum distichum (White Forsythia)
Abeliophyllum spp.
Abies amabilis (Pacific Silver Fir)
Abies balsamea (Balsam Fir)
Abies balsamea 'Nana' (Dwarf Balsam Fir)
Abies borisii-regis (Bulgarian Fir)
Abies concolor (white fir)
Abies delavayi (Delavay Fir)
Abies fraseri (Fraser Fir)
Abies grandis (grand fir)
Abies koreana (Korean fir)
Abies koreana 'Kohout's Ice Breaker' (Kohout's ice breaker fir)
Abies koreana 'Silberlocke' (Silberlocke Korean Fir)
Abies lasiocarpa (alpine fir)
Abies magnifica (California Red Fir)
Abies numidica (Algerian Fir)
Abies pinsapo (Spanish fir)
Abies pinsapo 'Glauca' (Blue Spanish Fir)
Abies procera (Noble Fir)
Abies procera 'Glauca' (Blue Noble Fir)
Abies spp. (firs)
Abronia latifolia (Yellow Sand Verbena)
Abronia spp.
Abronia umbellata (Pink Sand Verbena)
Abronia villosa (desert sand verbena)
Abrus precatorius (rosary pea)
Abrus spp.
Abutilon fruticosum (sweet Indian Mallow)
Abutilon spp. (Indian mallows)
Abutilon theophrasti (velvetleaf)
Acacia acinacea (Round-leaf Wattle)
Acacia baileyana (Cootamundra wattle)
Acacia brownii (heath wattle)
Acacia complanata (flat-stemmed wattle)
Acacia dealbata (Silver wattle)
Acacia decurrens (Sydney green wattle)
Acacia disparrima (Southern Salwood)
Acacia falcata (sickle wattle)
Acacia fimbriata (Brisbane wattle)
Acacia floribunda (Weeping Acacia)
Acacia genistifolia (Spreading Wattle)
Acacia gunnii (ploughshare wattle)
Acacia implexa (Lightwood)
Acacia irrorata (green wattle)
Acacia iteaphylla (Flinders Range Wattle)
Acacia leiocalyx (black wattle)
Acacia ligulata (Dune Wattle)
Acacia linifolia (Flax-leaved Wattle)
Acacia longifolia (Longleaf Wattle)
Acacia maidenii (Maiden's Wattle)
Acacia mearnsii (black wattle)
Acacia melanoxylon (blackwood)
Acacia mucronata (Variable sallow wattle)
Acacia myrtifolia (Myrtle Wattle)
Acacia oxycedrus (Spike Wattle)
Acacia paradoxa (Kangaroo thorn)
Acacia parramattensis (Parramatta Green Wattle)
Acacia podalyriifolia (Queensland silver wattle)
Acacia pulchella (Prickly Moses)
Acacia pycnantha (Golden Wattle)
Acacia salicina (Willow Acacia)
Acacia saligna (golden wreath wattle)
Acacia spinescens (spiny wattle)
Acacia spp. (wattles)
Acacia stenophylla
Acacia stricta (Hop wattle)
Acacia suaveolens (Sweet Wattle)
Acacia terminalis (Sunshine Wattle)
Acacia ulicifolia (juniper wattle)
Acacia verniciflua (Varnish Wattle)
Acacia verticillata (Prickly moses)
Acaena echinata (Sheep's Burr)
Acaena novae-zelandiae (Biddy-biddy)
Acaena spp. (Bidibid)
Acalypha persimilis (hornbeam copperleaf)
Acalypha rhomboidea (Common Three-seeded Mercury)
Acalypha spp. (three-seeded mercuries)
Acanthocereus spp.
Acanthocereus tetragonus (Fairy Castle Cactus)
Acanthus mollis (bear's breech)
Acanthus spinosus (Spiny Bear's Breeches)
Acanthus spp. (Acanthus)
Acer buergerianum (Trident Maple)
Acer campestre (Field Maple)
Acer capillipes (Snakebark Maple)
Acer circinatum (Vine maple)
Acer cissifolium (Ivy-leaved Maple)
Acer crataegifolium (Hawthorn-leaved Maple)
Acer davidii (snakebark maple)
Acer floridanum (southern sugar maple)
Acer × freemanii 'Jeffersred' (Autumn Flame Maple)
Acer ginnala (Amur Maple)
Acer glabrum (Douglas Maple)
Acer grandidentatum (bigtooth maple)
Acer griseum (paperbark maple)
Acer macrophyllum (bigleaf maple)
Acer monspessulanum
Acer negundo (Box Elder)
Acer nigrum (black maple)
Acer palmatum (Japanese maple)
Acer palmatum 'Atropurpureum' (red Japanese maple)
Acer palmatum 'Bloodgood' (Bloodgood Japanese Maple)
Acer palmatum 'Crimson Queen' (Crimson Queen Japanese Maple Tree)
Acer palmatum 'Osakazuki' (Osakazuki Japanese Maple)
Acer palmatum 'Red Dragon' (Red Dragon Japanese Maple)
Acer palmatum 'Seiryû' (Seiryu Japanese Maple)
Acer palmatum 'Shaina' (Shaina Japanese Maple)
Acer palmatum 'Shishigashira' (Lion's Head Japanese Maple)
Acer palmatum var. dissectum (laceleaf Japanese maple)
Acer palmatum var. dissectum 'Dissectum Atropurpreum' (weeping red laceleaf Japanese maple)
Acer palmatum 'Viridis' (Viridis Japanese Maple)
Acer palmatum 'Waterfall' (Waterfall Japanese Maple Tree)
Acer palmatum 'Wolff' (Wolff Japanese Maple)
Acer pensylvanicum (striped maple)
Acer pictum (Painted Maple)
Acer platanoides (Norway maple)
Acer platanoides 'Crimson King' (Crimson King maple)
Acer platanoides 'Royal Red' (Royal Red Norway Maple Tree)
Acer pseudoplatanus (sycamore maple)
Acer pseudoplatanus 'Atropurpureum' (Purple Sycamore Maple)
Acer pseudoplatanus 'Leopoldii' (Leopoldii Sycamore Maple)
Acer pseudosieboldianum (Korean Maple)
Acer rubrum (red maple)
Acer rubrum 'October Glory' (October Glory Red Maple Tree)
Acer saccharinum (silver maple)
Acer saccharum (sugar maple)
Acer saccharum 'Green Mountain' (Green Mountain Sugar Maple Tree)
Acer shirasawanum 'Aureum' (Golden Full Moon Maple)
Acer shirasawanum 'Autumn Moon' (Autumn Moon Maple)
Acer sieboldianum (Siebold Maple)
Acer spicatum (Mountain Maple)
Acer spp. (maples)
Acer tataricum subsp. ginnala (Amur maple)
Acer tegmentosum (Manchurian Striped Maple)
Acer tegmentosum 'Joe Witt' (Joe Witt Striped Maple)
Acer triflorum (Three-flower Maple)
Acer truncatum (Shantung Maple)
Achillea ageratifolia (Greek Yarrow)
Achillea filipendulina (Fern-leaf Yarrow)
Achillea millefolium (common yarrow)
Achillea millefolium 'Cerise Queen'
Achillea millefolium 'Paprika' (Paprika Yarrow)
Achillea × 'Moonshine' (Moonshine Yarrow)
Achillea ptarmica (Sneezewort)
Achillea spp. (yarrows)
Achillea × 'Terracotta' (Terracotta Yarrow)
Achlys spp.
Achlys triphylla (vanilla-leaf)
Achyrachaena mollis (Blow Wives)
Achyrachaena spp.
Acianthus caudatus (Mayfly orchid)
Acianthus fornicatus (Pixie Caps)
Acianthus pusillus (small mosquito-orchid)
Acianthus spp.
Acmella repens (Oppositeleaf Spotflower)
Acmella spp. (spotflowers)
Acmispon americanus (Spanish clover)
Acmispon glaber (deerweed)
Acmispon spp. (deervetch)
Acmispon strigosus (strigose lotus)
Aconitum bicolor (Bicolor Monkshood)
Aconitum carmichaelii (Azure Monkshood)
Aconitum columbianum (Columbian Monkshood)
Aconitum hemsleyanum (Climbing Monkshood)
Aconitum napellus (Common Monkshood)
Aconitum spp. (Monkshoods)
Acorus gramineus 'Ogon' (Golden Variegated Sweet Flag)
Acorus spp.
Acronychia imperforata (Beach Acronychia)
Acronychia laevis (glossy acronychia)
Acronychia spp.
Acrostichum danaeifolium (Giant leather fern)
Acrostichum spp.
Acrotriche aggregata (Ground Berry)
Acrotriche serrulata (Honey-pots)
Acrotriche spp.
Actaea pachypoda (White Baneberry)
Actaea racemosa (Black Cohosh)
Actaea rubra (red baneberry)
Actaea simplex 'Black Negligee' (Black Negligee Bugbane)
Actaea spp. (baneberries and cohoshes)
Actinidia deliciosa (kiwi)
Actinidia kolomikta (same)
Actinidia spp.
Actinotus helianthi (Flannel Flower)
Actinotus minor (Lesser Flannel Flower)
Actinotus spp.
Adelinia grandis (Pacific hound's tongue)
Adelinia spp.
Adenanthos sericeus
Adenanthos spp.
Adenanthos terminalis (Gland Flower)
Adenium obesum (Desert Rose)
Adenium spp.
Adenocaulon bicolor (American trailplant)
Adenocaulon spp.
Adenostoma fasciculatum (chamise)
Adenostoma spp.
Adesmia spp.
Adiantum aethiopicum (common maidenhair fern)
Adiantum aleuticum (western maidenhair fern)
Adiantum capillus-veneris (black maidenhair fern)
Adiantum formosum (Giant maidenhair fern)
Adiantum hispidulum (Rough Maidenhair Fern)
Adiantum jordanii (California Maidenhair Fern)
Adiantum pedatum (Northern Maidenhair Fern)
Adiantum raddianum (Maidenhair Fern)
Adiantum venustum (Himalayan maidenhair fern)
Adonidia merrillii (Christmas Palm)
Adonidia spp.
Adoxa moschatellina (Moschatel)
Adoxa spp.
Aechmea fasciata (Silver Vase Bromeliad)
Aechmea spp.
Aegiceras corniculatum (river mangrove)
Aegiceras spp.
Aegopodium podagraria (Goutweed)
Aegopodium spp.
Aeonium arboreum (Tree Aeonium)
Aeonium spp. (tree houseleeks)
Aesculus californica (California Buckeye)
Aesculus × carnea 'Briotii' (red horse chestnut)
Aesculus chinensis (Chinese Horse Chestnut)
Aesculus flava (Yellow Buckeye)
Aesculus glabra (Ohio Buckeye)
Aesculus hippocastanum (horse chestnut)
Aesculus indica (Indian Horse Chestnut)
Aesculus parviflora (Bottlebrush Buckeye)
Aesculus pavia (Red Buckeye)
Aesculus spp. (buckeyes and horse-chestnuts)
Aesculus turbinata (Japanese Horse Chestnut)
Aethusa cynapium (Fool's parsley)
Aethusa spp.
Agalinis heterophylla (Prairie False Foxglove)
Agalinis purpurea (purple false foxglove)
Agalinis spp. (false foxgloves)
Agalinis tenuifolia (slender false foxglove)
Agapanthus africanus (lily of the Nile)
Agapanthus praecox (blue lily)
Agastache (Hyssops)
Agastache 'Black Adder' (Black Adder Hummingbird Mint)
Agastache 'Blue Fortune' (Blue Fortune Hummingbird Mint)
Agastache foeniculum (Anise Hyssop)
Agastache rupestris (Sunset Hyssop)
Agastache spp. (hyssop)
Agastache urticifolia (nettle-leaf giant hyssop)
Agathosma spp. (Buchus)
Agave americana (Century Plant)
Agave americana 'Variegata' (Variegated Century Plant)
Agave attenuata (Fox Tail Agave)
Agave × 'Blue Glow' (Blue Glow Agave)
Agave deserti (desert agave)
Agave geminiflora (Twin Flower Agave Plant)
Agave palmeri (Palmer's agave)
Agave parryi var. couesii (Coues Agave)
Agave spp. (century plants)
Agave vilmoriniana (Octopus Agave)
Ageratina adenophora (Crofton Weed)
Ageratina altissima 'Chocolate' (Chocolate White Snakeroot)
Ageratina havanensis (Shrubby boneset)
Ageratina riparia (mist flower)
Ageratina spp. (snakeroots)
Ageratum houstonianum (Flossflower)
Ageratum spp. (Ageratums)
Aglaonema commutatum (Chinese Evergreen)
Aglaonema spp. (Chinese evergreens)
Agonis flexuosa (Western Australian Peppermint)
Agonis spp.
Agoseris spp. (mountain dandelions)
Agrimonia eupatoria (common agrimony)
Agrimonia gryposepala (tall hairy agrimony)
Agrimonia parviflora (swamp agrimony)
Agrimonia spp. (agrimonies)
Agropyron cristatum (Crested Wheatgrass)
Agropyron spp.
Agrostemma githago (corn cockle)
Agrostemma spp.
Agrostis gigantea (redtop)
Agrostis spp. (bent grass)
Ailanthus altissima (tree of heaven)
Ailanthus spp.
Aira praecox (early hair grass)
Aira spp.
Aizoon pubescens (Coastal Galenia)
Aizoon spp.
Ajuga australis (Austral Bugle)
Ajuga reptans (creeping bugleweed)
Ajuga reptans 'Black Scallop'
Ajuga reptans 'Chocolate Chip' (Chocolate Chip Bugleweed)
Ajuga spp. (Bugles)
Akebia quinata (five-leaved akebia)
Akebia spp.
Albizia julibrissin (silk tree)
Albizia spp. (Mimosa, silk trees, false-thorns, and allies)
Albuca spp. (Slimelilies)
Alcea rosea (common hollyhock)
Alcea spp. (hollyhocks)
Alchemilla alpina (Alpine Lady's-mantle)
Alchemilla arvensis (Field Parsley Piert)
Alchemilla conjuncta (Silver Lady's Mantle)
Alchemilla erythropoda
Alchemilla mollis (Lady's Mantle)
Alchemilla spp. (Lady's-mantles)
Alchemilla vulgaris (Lady's-mantle)
Alchornea ilicifolia (Native Holly)
Alchornea spp.
Alectryon spp.
Alectryon tomentosus (Hairy Alectryon)
Alisma plantago-aquatica (water-plantain)
Alisma spp. (water-plantains)
Allamanda cathartica (Allamanda Vine)
Allamanda spp.
Alliaria petiolata (garlic mustard)
Alliaria spp.
Allionia incarnata (Trailing Windmills)
Allionia spp.
Allium acuminatum (Hooker's Onion)
Allium × 'Ambassador' (Ambassador Allium)
Allium atropurpureum (Dark Purple Allium)
Allium canadense (Canadian Meadow garlic)
Allium cepa 'Australian Brown' (Australian Brown Onion)
Allium cepa 'Bridger' (Bridger Onion)
Allium cepa 'Cabernet' (Cabernet Red Onion)
Allium cepa 'Candy' (Candy Onion)
Allium cepa 'Copra' (Copra Onion)
Allium cepa 'Evergreen Hardy White' (Evergreen Hardy White Bunching Onion)
Allium cepa 'Granex' (Granex Onion)
Allium cepa 'Patterson' (Patterson Onion)
Allium cepa 'Red Baron' (Red Baron Scallion)
Allium cepa 'Red Candy Apple' (Red Candy Apple Onion)
Allium cepa 'Red Creole' (Red Creole Onion)
Allium cepa 'Red Wing' (Red Wing Storage Onion)
Allium cepa 'Superstar' (Superstar Onion)
Allium cepa 'Super Star' (Super Star Onion)
Allium cepa 'Texas Super Sweet' (Texas Super Sweet Onion)
Allium cepa 'Walla Walla' (Walla Walla Sweet Onion)
Allium cepa 'Yellow Granex' (Yellow Granex Onion)
Allium cepa 'Yellow Sweet Spanish' (Yellow Sweet Spanish Onion)
Allium cernuum (Nodding Onion)
Allium cristophii (Star of Persia)
Allium drummondii (Drummond's Onion)
Allium fistulosum (Welsh Onion (Scallions))
Allium fistulosum 'Evergreen Hardy White' (Evergreen Hardy White Bunching Onion)
Allium × 'Gladiator' (Gladiator Allium)
Allium 'Globemaster' (globemaster onion)
Allium hollandicum 'Purple Sensation' (Purple Sensation Allium)
Allium karataviense 'Ivory Queen' (Ivory Queen Allium)
Allium moly (Golden Garlic)
Allium 'Mount Everest' (Mount Everest Allium)
Allium obliquum
Allium paradoxum (Few-flowered Leek)
Allium × 'Pinball Wizard' (Pinball Wizard Allium)
Allium proliferum (tree onion)
Allium 'Red Giant' (Red Giant Ornamental Onion)
Allium roseum (rosy garlic)
Allium sativum 'California Early' (California Early Softneck Garlic)
Allium sativum 'Music' (Music Hardneck Garlic)
Allium schoenoprasum (Chives)
Allium schubertii (satellite onion)
Allium siculum
Allium sphaerocephalon (Drumstick Allium)
Allium spp. (onions)
Allium tricoccum (wide leek)
Allium triquetrum (Three-cornered garlic)
Allium tuberosum (Garlic Chives)
Allium unifolium (one-leaved onion)
Allium ursinum (Ramsons)
Allium vineale (wild garlic)
Allocasuarina humilis (dwarf sheoak)
Allocasuarina littoralis (Black sheoak)
Allocasuarina muelleriana (slaty sheoak)
Allocasuarina spp. (sheoaks)
Allocasuarina torulosa (Forest sheoak)
Allocasuarina verticillata (Drooping She-oak)
Allowissadula holosericea (velvet-leaf mallow)
Allowissadula spp.
Alnus alnobetula (green alder)
Alnus cordata (Italian alder)
Alnus glutinosa (common alder)
Alnus incana (Mountain Alder)
Alnus rhombifolia (white alder)
Alnus rubra (red alder)
Alnus serrulata (smooth alder)
Alocasia brisbanensis (Cunjevoi)
Alocasia odora (Upright Elephant Ear)
Alocasia reginula (Black Velvet Alocasia)
Alocasia spp. (elephant's-ears)
Alocasia zebrina (Zebra Alocasia)
Aloe arborescens (Candelabra Aloe)
Aloe spp. (Aloes)
Aloe vera (Aloe Vera)
Alopecurus geniculatus (Marsh foxtail)
Alopecurus pratensis (Meadow Foxtail)
Alopecurus spp. (Foxtail grasses)
Aloysia gratissima (Whitebrush)
Aloysia spp.
Alphitonia excelsa (Red Ash)
Alphitonia spp.
Alpinia caerulea (Native Ginger)
Alpinia purpurata (Red Ginger)
Alpinia spp. (Shell Gingers)
Alstonia constricta (Bitterbark)
Alstonia spp.
Alternanthera denticulata (Lesser Joyweed)
Alternanthera ficoidea (Joseph's Coat)
Alternanthera philoxeroides (Alligatorweed)
Alternanthera spp.
Althaea officinalis (marsh mallow)
Althaea spp.
Alyogyne spp.
Alyssum spp. (Alyssum)
Alyxia buxifolia (Sea Box)
Alyxia ruscifolia (Chain Fruit)
Alyxia spp.
Amaranthus palmeri (Palmer's Amaranth)
Amaranthus spp. (amaranths)
Amaryllis belladonna (Belladonna Lily)
Amaryllis spp.
Amauropelta noveboracensis (New York fern)
Amauropelta spp.
Amblystegium serpens (creeping feather-moss)
Amblystegium spp.
Ambrosia acanthicarpa (Flatspine Bursage)
Ambrosia artemisiifolia (common ragweed)
Ambrosia chamissonis (silver beachweed)
Ambrosia deltoidea (triangle-leaf bursage)
Ambrosia dumosa (Burrobush)
Ambrosia psilostachya (western ragweed)
Ambrosia salsola (Cheesebush)
Ambrosia spp. (Ragweeds)
Ambrosia trifida (giant ragweed)
Amelanchier alnifolia (serviceberry)
Amelanchier arborea (common serviceberry)
Amelanchier grandiflora (Apple Serviceberry)
Amelanchier spp. (serviceberries)
Amelanchier ssp. (serviceberry)
Amelanchier utahensis (Utah Serviceberry)
Ammophila spp.
Amorpha canescens (leadplant)
Amorpha fruticosa (false indigo bush)
Amorpha spp.
Ampelodesmos spp.
Ampelopsis cordata (heart leaf peppervine)
Ampelopsis glandulosa (Porcelain Berry)
Ampelopsis spp. (porcelainberry)
Amperea spp.
Amperea xiphoclada (Broom Spurge)
Amphiachyris dracunculoides (prairie broomweed)
Amphiachyris spp.
Amphibolis antarctica (Sea Nymph)
Amphibolis spp.
Amphicarpaea bracteata (American hog-peanut)
Amphicarpaea spp.
Amsinckia menziesii (Common Fiddleneck)
Amsinckia spp. (Fiddlenecks)
Amsinckia tessellata (Bristly Fiddleneck)
Amsonia × 'Blue Ice' (Blue Ice Bluestar)
Amsonia ciliata (Fringed Bluestar)
Amsonia hubrichtii (Arkansas Bluestar)
Amsonia illustris (Shining Bluestar)
Amsonia spp. (bluestars)
Amsonia tabernaemontana (Eastern Bluestar)
Amsonia tabernaemontana var. salicifolia (Willow-leaf Bluestar)
Amyema cambagei (needle-leaf mistletoe)
Amyema congener (variable mistletoe)
Amyema miquelii (Box Mistletoe)
Amyema pendula (drooping mistletoe)
Amyema preissii (wireleaf mistletoe)
Amyema quandang (grey mistletoe)
Amyema spp.
Anacamptis morio (green-winged orchid)
Anacamptis pyramidalis (pyramidal orchid)
Anacamptis spp.
Anacardium occidentale (Cashew)
Anacardium spp.
Anacyclus spp.
Ananas comosus (Pineapple Plant)
Ananas spp.
Anaphalis margaritacea (pearly everlasting)
Anaphalis spp. (everlastings)
Anaphalis triplinervis (Triple-Veined Pearly Everlasting)
Anasa spp.
Anasa tristis (Squash Bug)
Anatherum spp. (New World Bluestems)
Anatherum tenuispatheum (Maritime Bushy Bluestem)
Anatherum virginicum (broomsedge bluestem)
Anchusa arvensis (small bugloss)
Anchusa azurea (Italian bugloss)
Anchusa officinalis (common bugloss)
Anchusa spp. (Alkanets)
Andersonglossum spp.
Andersonglossum virginianum (wild comfrey)
Andromeda polifolia (Bog Rosemary)
Andromeda spp.
Andropogon gerardi (big bluestem)
Andropogon gerardii (Big Bluestem)
Andropogon spp. (bluestems)
Andropogon ternarius (Splitbeard Bluestem)
Andropogon virginicus (Broomsedge Bluestem)
Aneilema acuminatum (Pointed Aneilema)
Aneilema spp.
Anemanthele lessoniana (New Zealand Wind Grass)
Anemanthele spp.
Anemonastrum canadense (Canada anemone)
Anemonastrum spp.
Anemone berlandieri (Tenpetal Anemone)
Anemone blanda (windflower)
Anemone coronaria (poppy anemone)
Anemone hupehensis 'September Charm' (September Charm Japanese Anemone)
Anemone leveillei
Anemone multifida
Anemone nemorosa (wood anemone)
Anemone spp. (anemones and thimbleweeds)
Anemone virginiana (tall thimbleweed)
Anemone x hybrida (Japanese anemone)
Anemonoides apennina (Blue Anemone)
Anemonoides blanda (Greek Anemone)
Anemonoides nemorosa (wood anemone)
Anemonoides quinquefolia (wood anemone)
Anemonoides ranunculoides (Yellow Anemone)
Anemonoides spp.
Anemonopsis macrophylla (False Anemone)
Anemonopsis spp.
Anemopsis californica (Yerba Mansa)
Anemopsis spp.
Anethum graveolens (Dill)
Anethum spp.
Angelica archangelica (Garden angelica)
Angelica atropurpurea (purple-stemmed angelica)
Angelica gigas (Korean Angelica)
Angelica spp. (angelicas)
Angelica sylvestris (Wild Angelica)
Angelonia angustifolia (Summer Snapdragon)
Angelonia spp.
Angophora costata (Smooth-barked apple)
Angophora floribunda (Rough-barked Apple)
Angophora hispida (Dwarf apple)
Angophora leiocarpa (Smooth-barked Apple)
Angophora spp.
Anigozanthos humilis (Catspaw)
Anigozanthos manglesii (Red and Green Kangaroo Paw)
Anigozanthos spp. (Kangaroo paws)
Anisocarpus madioides (woodland madia)
Anisocarpus spp.
Annona glabra (Pond Apple)
Annona muricata (Soursop)
Annona spp. (custard apples)
Annona squamosa (Sugar Apple)
Anopterus glandulosus (Tasmanian laurel)
Anopterus spp.
Anredera cordifolia (Mignonette vine)
Anredera spp.
Antennaria dioica 'Rubra'
Antennaria microphylla (Rosy Pussytoes)
Antennaria neglecta (Field Pussytoes)
Antennaria parlinii (Parlin's Pussytoes)
Antennaria parvifolia (small-leaf pussytoes)
Antennaria plantaginifolia (plantain-leaved pussytoes)
Antennaria rosea (Rosy Pussytoes)
Antennaria spp. (pussytoes)
Anthemis cotula (chamomile)
Anthemis spp. (Chamomiles)
Anthericum ramosum
Anthericum spp.
Anthoxanthum odoratum (sweet vernal grass)
Anthoxanthum spp. (sweetgrasses)
Anthriscus caucalis (Bur Parsley)
Anthriscus cerefolium (Chervil)
Anthriscus spp. (Chervils)
Anthriscus sylvestris (wild chervil)
Anthurium andraeanum (Flamingo Flower)
Anthurium clarinervium (Velvet Cardboard Anthurium)
Anthurium spp. (anthuriums)
Anthyllis spp.
Anthyllis vulneraria (Common Kidney-Vetch)
Anticlea elegans (Mountain Deathcamas)
Anticlea spp.
Antigonon leptopus (Coral Vine)
Antigonon spp.
Antirrhinum majus (snapdragon)
Antirrhinum spp. (Snapdragons)
Aotus ericoides (Common Aotus)
Aotus spp.
Aphananthe philippinensis (Axe handle Wood)
Aphananthe spp.
Aphanostephus ramosissimus (Lazy Daisy)
Aphanostephus spp.
Aphyllon spp.
Aphyllon uniflorum (one-flowered cancer-root)
Apios americana (American groundnut)
Apios spp.
Apium prostratum (Sea Celery)
Apium spp.
Aplectrum hyemale (putty root)
Aplectrum spp.
Apoballis spp.
Apocissus antarctica (Kangaroo Vine)
Apocissus hypoglauca (Five-Leaved Water Vine)
Apocissus spp.
Apocynum androsaemifolium (Spreading Dogbane)
Apocynum cannabinum (hemp dogbane)
Apocynum × floribundum (intermediate dogbane)
Apocynum spp. (dogbanes)
Aponogeton distachyos
Aponogeton natans (floating water hawthorn)
Aponogeton spp.
Apopellia endiviifolia (Endive Pellia)
Apopellia spp.
Aptenia cordifolia (Livingstone Daisy)
Aptenia spp.
Aquilegia canadensis (Wild Columbine)
Aquilegia coerulea (blue columbine)
Aquilegia formosa (Red Columbine)
Aquilegia spp. (columbines)
Aquilegia vulgaris (columbine)
Aquilegia vulgaris var. stellata 'Black Barlow'
Arabidopsis lyrata (Lyreleaf Rockcress)
Arabidopsis spp.
Arabidopsis thaliana (mouse-ear cress)
Arabis spp. (Rock-cresses)
Arachis spp. (peanuts)
Arachniodes simplicior (Variegated Holly Fern)
Arachniodes spp.
Aralia californica (California Spikenard)
Aralia elata (Japanese angelica tree)
Aralia nudicaulis (wild sarsaparilla)
Aralia racemosa (American spikenard)
Aralia spinosa (devil's walkingstick)
Aralia spp. (spikenards)
Araucaria araucana (Monkey Puzzle Tree)
Araucaria bidwillii (Bunya Pine)
Araucaria cunninghamii (Hoop pine)
Araucaria heterophylla (Norfolk Island Pine)
Araucaria spp. (araucarias)
Araujia sericifera (Moth Vine)
Araujia spp.
Arbutus 'Marina' (Marina Strawberry Tree)
Arbutus menziesii (madrone)
Arbutus spp. (madrones)
Arbutus unedo (strawberry tree)
Arbutus x andrachnoides
Archontophoenix cunninghamiana (Piccabeen Palm)
Archontophoenix spp.
Arctium lappa (greater burdock)
Arctium minus (burrdock)
Arctium spp. (burdocks)
Arctium tomentosum (Woolly Burdock)
Arctostaphylos (bearberries and manzanitas)
Arctostaphylos columbiana (hairy manzanita)
Arctostaphylos densiflora (Sentinel Manzanita)
Arctostaphylos edmundsii (Pacific Mist Manzanita)
Arctostaphylos glandulosa (Eastwood's Manzanita)
Arctostaphylos glauca (Big Berry Manzanita)
Arctostaphylos hookeri (Mills Manzanita)
Arctostaphylos manzanita (Dr. Hurd Manzanita)
Arctostaphylos × media
Arctostaphylos patula (greenleaf manzanita)
Arctostaphylos pungens (pointleaf manzanita)
Arctostaphylos spp. (manzanita)
Arctostaphylos uva-ursi (kinnikinnick)
Arctostaphylos viscida (Whiteleaf Manzanita)
Arctotheca calendula (Capeweed)
Arctotheca spp.
Arctotis spp. (African Daisies)
Ardisia crenata (Coralberry)
Ardisia spp. (marlberry)
Arenaria serpyllifolia (Thyme-leaved Sandwort)
Arenaria spp.
Argemone albiflora (white prickly poppy)
Argemone munita (flatbud prickly poppy)
Argemone platyceras
Argemone polyanthemos (thistle poppy)
Argemone spp. (prickly poppies)
Argentina anserina (common silverweed)
Argentina pacifica (Pacific silverweed)
Argentina spp. (Silverweeds)
Argentipallium obtusifolium (Blunt everlasting)
Argentipallium spp.
Argyranthemum spp.
Aria edulis (Whitebeam)
Aria spp.
Arisaema (jack-in-the-pulpits and cobra lilies)
Arisaema candidissimum (White Jack-in-the-pulpit)
Arisaema consanguineum (Cobra Lily)
Arisaema dracontium (green dragon)
Arisaema ringens (Japanese Cobra Plant)
Arisaema sikokianum (Shikoku Cobra Lily)
Arisaema taiwanense (Formosa Cobra Lily)
Arisaema triphyllum (Jack-in-the-pulpit)
Arisarum proboscideum (Mouse Plant)
Arisarum spp.
Aristea spp. (Blue Brilliant)
Aristida purpurea (Purple Threeawn)
Aristida spp. (threeawns and wiregrasses)
Aristolochia californica (California Dutchman's Pipe)
Aristolochia spp. (pipevines and birthworts)
Armeria maritima (sea thift)
Armeria maritima 'Victor Reiter' (Victor Reiter Sea Thrift)
Armeria spp. (Thrift)
Armoracia rusticana (Horseradish)
Armoracia spp.
Arnica chamissonis (Meadow Arnica)
Arnica cordifolia (heartleaf arnica)
Arnica spp.
Arnoglossum atriplicifolium (pale Indian plantain)
Arnoglossum plantagineum (prairie Indian plantain)
Arnoglossum spp.
Aronia arbutifolia (red chokeberry)
Aronia melanocarpa (Chokecherry)
Aronia melanocarpa 'Viking' (Viking Aronia Chokeberry)
Aronia × prunifolia (purple chokeberry)
Aronia spp. (chokeberries)
Arrhenatherum elatius (tall oat grass)
Arrhenatherum spp.
Artemisia abrotanum (Southernwood)
Artemisia californica (California sagebrush)
Artemisia caudata (Beach Wormwood)
Artemisia douglasiana (California mugwort)
Artemisia dracunculus (French Tarragon)
Artemisia filifolia (sand sagebrush)
Artemisia frigida (fringed sagebrush)
Artemisia lactiflora (White Mugwort)
Artemisia ludoviciana (Silver Wormwood)
Artemisia mauiensis 'Makana Silver'
Artemisia pontica (Roman Wormwood)
Artemisia 'Powis Castle' (Powis Castle Artemisia)
Artemisia pycnocephala (coastal sagewort)
Artemisia spp. (wormwoods and sagebrushes)
Artemisia suksdorfii (Coastal Mugwort)
Artemisia tridentata (Big Sagebrush)
Artemisia vulgaris (common mugwort)
Arthropodium candidum (White Rock Lily)
Arthropodium fimbriatum (Nodding Chocolate Lily)
Arthropodium milleflorum (pale vanilla lily)
Arthropodium spp.
Arthropodium strictum (chocolate lily)
Arthropteris spp.
Arthropteris tenella (Climbing Fern)
Artocarpus spp.
Arum italicum (lords and ladies)
Arum maculatum (Cuckoo-pint)
Arum spp. (arum lilies)
Aruncus aethusifolius
Aruncus dioicus (goatsbeard)
Aruncus spp.
Arundinaria gigantea (river cane)
Arundinaria spp. (Canes)
Arundinaria tecta (switch cane)
Arundo donax (giant reed)
Arundo spp.
Asarum arifolium (Little Brown Jugs)
Asarum caudatum (Wild Ginger)
Asarum europaeum (European Wild Ginger)
Asarum reflexum (Reflexed Wild Ginger)
Asarum splendens (Chinese Wild Ginger)
Asarum spp. (wild gingers)
Asclepias (milkweeds)
Asclepias amplexicaulis (clasping milkweed)
Asclepias asperula (Antelopehorn Milkweed)
Asclepias cordifolia (heart-leaf milkweed)
Asclepias curassavica (tropical milkweed)
Asclepias eriocarpa (woollypod milkweed)
Asclepias exaltata (poke milkweed)
Asclepias fascicularis (Narrow-leaf Milkweed)
Asclepias humistrata (Sandhill milkweed)
Asclepias incarnata (Swamp Milkweed)
Asclepias incarnata 'Ice Ballet' (Ice Ballet Swamp Milkweed)
Asclepias latifolia (broadleaf milkweed)
Asclepias oenotheroides (Zizotes milkweed)
Asclepias perennis (Aquatic Milkweed)
Asclepias purpurascens (purple milkweed)
Asclepias quadrifolia (four-leaved milkweed)
Asclepias speciosa (Showy Milkweed)
Asclepias spp. (Native Milkweed Selections)
Asclepias syriaca (common milkweed)
Asclepias tuberosa (Butterfly Weed)
Asclepias variegata (redring milkweed)
Asclepias verticillata (Whorled Milkweed)
Asclepias viridiflora (green comet milkweed)
Asclepias viridis (green antelopehorns)
Asimina parviflora (Small-Flower Pawpaw)
Asimina × piedmontana
Asimina reticulata (netted pawpaw)
Asimina spp.
Asimina triloba (Pawpaw)
Aspalathus spp. (Aspalathuses)
Asparagus aethiopicus (African Asparagus)
Asparagus asparagoides (Cape Smilax)
Asparagus densiflorus 'Myersii' (Foxtail Fern)
Asparagus officinalis (wild asparagus)
Asparagus scandens (Climbing asparagus)
Asparagus setaceus (Asparagus Plumosa Fern)
Asparagus spp. (Asparagus)
Asperula conferta (Common Woodruff)
Asperula spp.
Asphodelus fistulosus (Onion-Leafed Asphodel)
Asphodelus spp. (asphodels)
Aspidistra elatior (Cast Iron Plant)
Aspidistra spp.
Asplenium adiantum-nigrum (black spleenwort)
Asplenium australasicum (Bird's nest fern)
Asplenium ceterach (Rustyback)
Asplenium flabellifolium (Necklace Fern)
Asplenium marinum (sea spleenwort)
Asplenium nidus (Bird's Nest Fern)
Asplenium platyneuron (ebony spleenwort)
Asplenium rhizophyllum (walking fern)
Asplenium ruta-muraria (wall-rue)
Asplenium scolopendrium (Harts Tongue Fern)
Asplenium scolopendrium 'Angustatum'
Asplenium spp. (Spleenworts)
Asplenium trichomanes (Maidenhair Spleenwort)
Aster (true asters)
Aster novi-belgii (New York Aster)
Aster spp. (aster)
Aster tataricus 'Jindai' (Jindai Aster)
Astilbe (false goat's beards)
Astilbe 'Amethyst' (Amethyst Astilbe)
Astilbe × arendsii 'Fanal' (Fanal Astilbe)
Astilbe chinensis 'Vision in Pink' (Vision in Pink Chinese Astilbe)
Astilbe chinensis 'Vision in White' (Vision in White Chinese Astilbe)
Astilbe × japonica 'Deutschland' (Deutschland Astilbe)
Astilbe japonica 'Europa'
Astilbe × japonica 'Rheinland' (Rheinland Astilbe)
Astilbe spp. (astilbe)
Astragalus lentiginosus (Freckled Milkvetch)
Astragalus purshii (woollypod milkvetch)
Astragalus spp. (milkvetches)
Astragalus trichopodus (Santa Barbara Milkvetch)
Astrantia major (Great Masterwort)
Astrantia major 'Roma' (Roma Masterwort)
Astrantia major 'Rubra' (Rubra Masterwort)
Astrantia major 'Ruby Wedding' (Ruby Wedding Masterwort)
Astrantia major 'Sunningdale Variegated' (Sunningdale Variegated Masterwort)
Astrantia major 'Venice'
Astrantia maxima (Large Masterwort)
Astrantia spp.
Astrotricha latifolia (Broad-leaf Star Hair)
Astrotricha spp.
Asystasia spp. (Coromandels)
Athyrium angustum (northern lady fern)
Athyrium asplenioides (southern lady fern)
Athyrium filix-femina (lady fern)
Athyrium filix-femina 'Frizelliae' (Tatting Fern)
Athyrium filix-femina 'Victoriae' (Victoria Lady Fern)
Athyrium 'Ghost' (Ghost Fern)
Athyrium niponicum 'Pictum' (Japanese Painted Fern)
Athyrium otophorum (Eared Lady Fern)
Athyrium spp. (lady ferns)
Atractocarpus fitzalanii (Brown Gardenia)
Atractocarpus spp.
Atrichum angustatum (lesser smoothcap)
Atrichum spp. (Smoothcap Mosses)
Atrichum undulatum (Catherine's moss)
Atriplex canescens (Fourwing Saltbush)
Atriplex cinerea (Grey Saltbush)
Atriplex confertifolia (Shadscale Saltbush)
Atriplex halimus
Atriplex hymenelytra (Desert Holly)
Atriplex laciniata (Frosted Orache)
Atriplex lentiformis (big saltbush)
Atriplex littoralis (Grass-leaved Orache)
Atriplex patula (Common Orache)
Atriplex portulacoides (Sea-purslane)
Atriplex prostrata (Creeping Saltbush)
Atriplex semibaccata (berry saltbush)
Atriplex spp. (Saltbushes)
Atropa bella-donna (Deadly Nightshade)
Atropa spp.
Aubrieta deltoidea (purple rock cress)
Aubrieta × 'Red Cascade' (Red Cascade Aubretia)
Aubrieta spp.
Aucuba japonica (Japanese aucuba)
Aucuba japonica 'Gold Dust' (Gold Dust aucuba)
Aucuba japonica 'Mr. Goldstrike' (Mr. Goldstrike Aucuba)
Aucuba spp.
Aureolaria spp. (yellow false foxgloves)
Aurinia saxatilis 'Summit' (Summit Basket of Gold)
Aurinia spp.
Austromyrtus dulcis (Midgen Berry)
Austromyrtus spp.
Austrosteenisia blackii (Blood Vine)
Austrosteenisia spp.
Austrostipa mollis (soft speargrass)
Austrostipa spp.
Avena barbata (slender wild oat)
Avena fatua (wild oat)
Avena sativa (Common Oat)
Avena spp. (Oats)
Avenella flexuosa (wavy hair-grass)
Avenella spp.
Averrhoa carambola (Star Fruit Carambola)
Averrhoa spp.
Avicennia germinans (black mangrove)
Avicennia marina (Grey Mangrove)
Avicennia spp.
Azadirachta indica (Neem Tree)
Azadirachta spp.
Azara microphylla (Boxleaf azara)
Azara spp.
Azolla pinnata (Feathered Mosquito Fern)
Azolla rubra (Red Azolla)
Azolla spp. (Mosquito Ferns)
Babiana spp. (Baboon Root)
Baccharis halimifolia (groundsel tree)
Baccharis neglecta (Poverty Weed)
Baccharis pilularis (Coyote Brush)
Baccharis salicifolia (mule fat)
Baccharis sarothroides (Desert Broom)
Baccharis spp.
Backhousia myrtifolia (Grey Myrtle)
Backhousia spp.
Bacopa monnieri (Herb-of-Grace)
Bacopa spp.
Bahiopsis laciniata (Tornleaf Goldeneye)
Bahiopsis parishii (Parish's Goldeneye)
Bahiopsis spp.
Baileya multiradiata (Desert Marigold)
Baileya spp.
Balduina angustifolia (coastal plain honeycombhead)
Balduina spp.
Ballota nigra (Black Horehound)
Ballota spp.
Baloskion spp.
Baloskion tetraphyllum (tassel cord-rush)
Balsamorhiza sagittata (arrowleaf balsamroot)
Balsamorhiza spp. (balsamroots)
Bambusa spp.
Banksia aemula (Wallum banksia)
Banksia attenuata (Candlestick Banksia)
Banksia collina (Hill Banksia)
Banksia cunninghamii
Banksia dallanneyi (couch honeypot)
Banksia ericifolia (Heath-leaved banksia)
Banksia grandis (Giant Banksia)
Banksia hookeriana
Banksia integrifolia (Coastal Banksia)
Banksia marginata (Silver Banksia)
Banksia menziesii (Firewood Banksia)
Banksia oblongifolia (Rusty Banksia)
Banksia ornata (Desert Banksia)
Banksia robur (Swamp Banksia)
Banksia serrata (Old man banksia)
Banksia sessilis (Parrot Bush)
Banksia spinulosa (Hairpin Banksia)
Banksia spinulosa 'Birthday Candles'
Banksia spp. (Banksias)
Baptisia alba var. macrophylla (Large-leaved White Wild Indigo)
Baptisia australis (Blue Wild Indigo)
Baptisia lactea (prairie false indigo)
Baptisia leucophaea (cream wild-indigo)
Baptisia 'Purple Smoke' (Purple Smoke Baptisia)
Baptisia spp. (wild indigos)
Baptisia tinctoria (eastern wild indigo)
Barbarea orthoceras (American yellowrocket)
Barbarea spp. (wintercresses)
Barbarea vulgaris (bitter wintercress)
Barbula calycina
Barbula spp.
Barbula unguiculata (Bird's-Claw Beard-Moss)
Barleria spp. (Bushviolets)
Bassia scoparia (summer-cypress)
Bassia spp.
Batis maritima (Saltwort)
Batis spp.
Bauera rubioides (River Rose)
Bauera spp.
Bauhinia blakeana (Hong Kong Orchid Tree)
Bauhinia spp. (Orchid Trees)
Bazzania spp.
Bazzania trilobata (greater whipwort)
Beaucarnea recurvata (Ponytail Palm)
Beaucarnea spp.
Bebbia juncea (Sweetbush)
Bebbia spp.
Bedfordia arborescens (Blanket Leaf)
Bedfordia salicina (Blanket Bush)
Bedfordia spp.
Beesia deltophylla (beesia)
Beesia spp.
Begonia ferox (Begonia Ferox)
Begonia grandis ssp. (Hardy Begonia)
Begonia grandis ssp. evansiana (Hardy Begonia)
Begonia longiciliata (Begonia Longiciliata)
Begonia masoniana (Criss Cross Begonia)
Begonia × semperflorens-cultorum (wax begonia)
Begonia soli-mutata (Begonia Soli-Mutata)
Begonia spp. (Begonias)
Begonia × tuberhybrida (Tuberous Begonia)
Belamcanda chinensis (Blackberry Lily)
Belamcanda spp.
Bellardia spp.
Bellardia trixago (Mediterranean lineseed)
Bellardia viscosa (Yellow Glandweed)
Bellendena montana (Mountain Rocket)
Bellendena spp.
Bellis perennis (Lawn daisy)
Bellis spp.
Berberis aquifolium (tall Oregon-grape)
Berberis bealei (leatherleaf mahonia)
Berberis buxifolia 'Nana' (Dwarf Magellan Barberry)
Berberis candidula (Paleleaf Barberry)
Berberis darwinii (Darwin's barberry)
Berberis gladwynensis 'William Penn' (William Penn Barberry)
Berberis × hortensis (Hybrid Mahonia)
Berberis japonica (Japanese Mahonia)
Berberis julianae (Wintergreen barberry)
Berberis nervosa (Oregon-grape)
Berberis repens (creeping mahonia)
Berberis spp. (Barberries)
Berberis thumbergii 'Orange Rocket' (Orange Rocket Barberry)
Berberis thunbergii (Japanese barberry)
Berberis thunbergii 'Aurea' (golden Japanese barberry)
Berberis thunbergii 'Crimson Pygmy' (Crimson Pygmy Barberry)
Berberis thunbergii f. atropurpurea (purpleleaf or redleaf Japanese barberry)
Berberis thunbergii f. atropurpurea 'Atropurpurea Nana' (Crimson Pygmy barberry)
Berberis thunbergii f. atropurpurea 'Helmond Pillar' (Helmond Pillar Japanese barberry)
Berberis thunbergii f. atropurpurea 'Rose Glow' (Rose Glow Japanese barberry)
Berberis thunbergii f. 'Bagatelle' (Bagatelle Barberry)
Berberis thunbergii f. 'Concorde' (Concorde Barberry)
Berberis thunbergii f. 'Golden Ring' (Golden Ring Barberry)
Berberis thunbergii f. 'Helmond Pillar' (Helmond Pillar Barberry)
Berberis thunbergii f. 'Rose Glow' (Rose Glow Barberry)
Berberis thunbergii 'Maria' (Sunjoy Golden Pillar Barberry)
Berberis trifoliolata (Agarita)
Berberis verruculosa (Warty barberry)
Berberis x gladwynensis (Gladwyne barberry)
Berberis x gladwynensis 'William Penn' (William Penn barberry)
Berchemia scandens (Supplejack)
Berchemia spp.
Bergenia (elephant-ears)
Bergenia ciliata (Frilly Bergenia)
Bergenia crassifolia (Heartleaf bergenia)
Bergenia purpurascens
Bergenia spp. (bergenia)
Berkheya spp. (African Thistles)
Berteroa incana (hoary alyssum)
Berteroa spp.
Berula erecta (cutleaf water parsnip)
Berula spp.
Beta spp.
Betonica officinalis (common hedge-nettle)
Betonica spp.
Betula alleghaniensis (Yellow Birch)
Betula lenta (sweet birch)
Betula nigra (River Birch)
Betula nigra 'Cully' (Heritage® river birch)
Betula papyrifera (paper birch)
Betula pendula (European white birch)
Betula pendula 'Dalecarlica' (cutleaf weeping birch)
Betula pendula 'Youngii' (Young's weeping birch)
Betula populifolia (gray birch)
Betula pubescens (Downy Birch)
Betula spp. (birches)
Betula utilis ssp. jacquemontii (Himalayan white birch)
Betula utilis var. jacquemontii (White-barked Himalayan Birch)
Bidens aristosa (Bearded Beggarticks)
Bidens bipinnata (Spanish needles)
Bidens cernua (Nodding Beggarticks)
Bidens frondosa (Devil's Beggarticks)
Bidens laevis (Smooth Beggarticks)
Bidens pilosa (Hairy Beggarticks)
Bidens spp. (Beggarticks)
Bigelowia nuttallii (Nuttall's Rayless Goldenrod)
Bigelowia spp.
Bignonia capreolata 'Tangerine Beauty' (Tangerine Beauty Crossvine)
Bignonia spp.
Billardiera cymosa (sweet apple-berry)
Billardiera fusiformis (Australian Bluebell)
Billardiera mutabilis (Common Apple-berry)
Billardiera scandens (Apple Berry)
Billardiera spp.
Bismarckia nobilis (Bismarck Palm)
Bismarckia spp.
Bistorta amplexicaulis (red bistort)
Bistorta bistortoides (American bistort)
Bistorta officinalis (common bistort)
Bistorta spp. (bistorts)
Blackstonia perfoliata (Yellow-wort)
Blackstonia spp.
Blandfordia nobilis (Christmas Bells)
Blandfordia spp.
Blechnum nudum (Fishbone water-fern)
Blechnum penna-marina (Alpine Water Fern)
Blechnum spp. (hard ferns)
Blechnum tabulare
Blechnum wattsii (Hard Water-fern)
Blephilia hirsuta (Hairy Wood Mint)
Blephilia spp.
Bloomeria crocea (goldenstar)
Bloomeria spp.
Boechera spp. (rockcresses)
Boehmeria cylindrica (false nettle)
Boehmeria platanifolia
Boehmeria spp. (false nettles and allies)
Boerhavia coccinea (scarlet spiderling)
Boerhavia spp. (Spiderlings)
Bolboschoenus maritimus (sea clubrush)
Bolboschoenus spp.
Bomarea spp.
Borago officinalis (borage)
Borago spp.
Borodinia laevigata (smooth rockcress)
Borodinia spp.
Boronia ledifolia (Sydney Boronia)
Boronia pinnata (Pink Boronia)
Boronia rosmarinifolia (Pink Boronia)
Boronia spathulata
Boronia spp.
Borrichia frutescens (sea ox-eye)
Borrichia spp.
Bossiaea cinerea (Showy Bossiaea)
Bossiaea heterophylla (Variable Bossiaea)
Bossiaea obcordata (Spiny Bossiaea)
Bossiaea prostrata (creeping bossiaea)
Bossiaea spp.
Bossiella spp.
Bothriochloa ischaemum (King Ranch bluestem)
Bothriochloa spp. (Bluestems)
Bothriochloa torreyana (silver bluestem)
Botrypus spp.
Botrypus virginianus (rattlesnake fern)
Bougainvillea × buttiana (garden bougainvillea)
Bougainvillea spectabilis (Bougainvillea)
Bougainvillea spp. (bougainvilleas)
Bouteloua curtipendula (Sideoats Grama)
Bouteloua dactyloides (Buffalo Grass)
Bouteloua gracilis (Blue Grama Grass)
Bouteloua spp. (gramas)
Bowlesia incana (hoary bowlesia)
Bowlesia spp.
Boykinia major (Boykinia)
Boykinia spp.
Brachychiton acerifolius (flame tree)
Brachychiton populneus (kurrajong)
Brachychiton rupestris (Queensland Bottle Tree)
Brachychiton spp. (Kurrajongs)
Brachyglottis Dunedin Hybrid 'Sunshine' (Sunshine Daisy Bush)
Brachyglottis spp.
Brachyloma daphnoides (Daphne heath)
Brachyloma ericoides (brush heath)
Brachyloma spp.
Brachypodium spp.
Brachypodium sylvaticum (Slender False Brome)
Brachyscome ciliaris (Variable Daisy)
Brachyscome multifida (cut-leaved daisy)
Brachyscome spathulata (Spoon Daisy)
Brachyscome spp.
Brachythecium albicans (Whitish Feather-moss)
Brachythecium rutabulum (Rough-stalked Feather-moss)
Brachythecium spp.
Brasenia schreberi (Watershield)
Brasenia spp.
Brassica juncea 'Osaka Purple' (Osaka Purple Mustard Greens)
Brassica juncea 'Red Giant' (Red Giant Mustard Greens)
Brassica napus 'Dwarf Essex' (Dwarf Essex Rape (Turnip Greens))
Brassica napus 'Red Russian' (Red Russian Kale)
Brassica oleracea 'Calabrese' (Calabrese Broccoli)
Brassica oleracea 'Cheddar' (Cheddar Cauliflower)
Brassica oleracea 'Copenhagen Market' (Copenhagen Market Cabbage)
Brassica oleracea 'Diablo' (Diablo Brussels Sprouts)
Brassica oleracea 'Di Cicco' (Di Cicco Broccoli)
Brassica oleracea 'Early Jersey Wakefield' (Early Jersey Wakefield Cabbage)
Brassica oleracea 'Georgia Southern' (Georgia Southern Collard Greens)
Brassica oleracea 'Lacinato' (Lacinato Kale)
Brassica oleracea 'Long Island Improved' (Long Island Improved Brussels Sprouts)
Brassica oleracea 'Purple of Sicily' (Purple of Sicily Cauliflower)
Brassica oleracea 'Red Acre' (Red Acre Cabbage)
Brassica oleracea 'Redbor' (Redbor Kale)
Brassica oleracea 'Red Russian' (Red Russian Kale)
Brassica oleracea 'Snow Crown' (Snow Crown Cauliflower)
Brassica oleracea var. sabellica 'Vates' (Vates Kale)
Brassica oleracea 'Waltham 29' (Waltham 29 Broccoli)
Brassica oleracea 'Winterbor' (Winterbor Kale)
Brassica rapa 'Hakurei' (Hakurei Turnip)
Brassica rapa 'Scarlet Queen' (Scarlet Queen Turnip)
Brassica rapa 'Seven Top' (Seven Top Turnip Greens)
Brassica rapa 'Tokyo Bekana' (Tokyo Bekana Asian Greens)
Brassica spp. (cabbages and mustards)
Brassica tournefortii (Saharan Mustard)
Breutelia affinis (Red-heart Moss)
Breutelia spp.
Breynia oblongifolia (coffee bush)
Breynia spp.
Brickellia californica (California Brickellbush)
Brickellia eupatorioides (False Boneset)
Brickellia spp. (brickellbushes)
Briza maxima (big quaking grass)
Briza media (Quaking-grass)
Briza minor (Little quaking-grass)
Briza spp.
Brodiaea coronaria (Crown Brodiaea)
Brodiaea elegans (Harvest Brodiaea)
Brodiaea spp. (Brodiaeas)
Bromelia spp.
Bromus catharticus (Rescue Brome)
Bromus diandrus (great brome)
Bromus hordeaceus (common soft brome)
Bromus inermis (smooth brome)
Bromus japonicus (Japanese brome)
Bromus rubens (Red Brome)
Bromus sitchensis (Alaska brome)
Bromus spp. (bromes)
Bromus sterilis (barren brome)
Bromus tectorum (cheat grass)
Broussonetia papyrifera (Paper mulberry)
Broussonetia spp.
Brugmansia (angel's trumpets)
Brugmansia suaveolens (Angel's Trumpet)
Bruguiera gymnorhiza (orange mangrove)
Bruguiera spp.
Brunfelsia pauciflora (Yesterday-Today-and-Tomorrow)
Brunfelsia spp. (raintrees)
Brunnera macrophylla (perennial forget-me-not)
Brunnera macrophylla 'Dawson's White' (Dawson's White Brunnera)
Brunnera macrophylla 'Hadspen Cream' (Hadspen Cream Brunnera)
Brunnera macrophylla 'Jack Frost' (Jack Frost Heartleaf Brunnera)
Brunnera spp.
Brunonia australis (blue pincushion)
Brunonia spp.
Brunoniella australis (Blue Trumpet)
Brunoniella spp.
Bryoandersonia illecebra (spoon-leaved moss)
Bryoandersonia spp.
Bryonia cretica (White Bryony)
Bryonia spp.
Bryum argenteum (Silvery Bryum)
Bryum spp.
Buchnera floridana (Florida bluehearts)
Buchnera spp.
Buddleja davidii (butterfly bush)
Buddleja davidii 'Black Knight' (Black Knight Butterfly Bush)
Buddleja davidii 'Pink Delight' (Pink Delight Butterfly Bush)
Buddleja globosa (globe butterfly bush)
Buddleja spp. (butterfly bushes and allies)
Buglossoides arvensis (corn gromwell)
Buglossoides spp.
Bulbine bulbosa (Bulbine Lily)
Bulbine spp. (Kopievas)
Bunium bulbocastanum
Bunium spp.
Buphthalmum salicifolium (Willowleaf Ox-eye)
Buphthalmum spp.
Bupleurum longifolium (Long-leaved Hare's Ear)
Bupleurum rotundifolium
Bupleurum spp.
Burchardia congesta (Milkmaids)
Burchardia spp.
Burchardia umbellata (Milkmaids)
Bursaria spinosa (Australian Blackthorn)
Bursaria spp.
Bursera simaruba (Gumbo Limbo)
Bursera spp.
Butia capitata (Pindo Palm)
Butia odorata (Jelly Palm)
Butia spp.
Butomus spp.
Butomus umbellatus (flowering rush)
Buxus × 'Green Velvet' (Green Velvet Boxwood)
Buxus microphylla 'Green Gem' (Green Gem Boxwood)
Buxus microphylla 'Winter Gem' (Winter Gem Boxwood)
Buxus sempervirens (English Boxwood)
Buxus sempervirens 'Aureovariegata' (Golden Variegated Boxwood)
Buxus sempervirens 'Green Mountain' (Green Mountain Boxwood)
Buxus sempervirens 'Suffruticosa' (Dwarf English Boxwood)
Buxus spp. (boxes)
Byrsonima spp. (byrsonima)
Caesalpinia pulcherrima (peacock flower)
Caesalpinia spp.
Caesia calliantha (blue grass lily)
Caesia parviflora (Pale Grass Lily)
Caesia spp.
Cakile edentula (American searocket)
Cakile maritima (European Searocket)
Cakile spp. (Searockets)
Caladenia cardiochila (thick-lipped spider-orchid)
Caladenia carnea (Pink Lady Fingers)
Caladenia catenata (Lady Fingers)
Caladenia flava (Cowslip Orchid)
Caladenia fuscata (Dusky Fingers)
Caladenia latifolia (Pink Fairies)
Caladenia longicauda (White Spider Orchid)
Caladenia moschata (Musky Caps)
Caladenia parva (Small Spider-orchid)
Caladenia picta (Painted Fingers)
Caladenia spp.
Caladenia tentaculata (eastern mantis orchid)
Caladenia transitoria (Eastern Bronzehood Orchid)
Caladium bicolor (Caladium)
Caladium spp. (Caladium)
Calamagrostis × acutiflora 'Overdam' (Overdam Feather Reed Grass)
Calamagrostis arenaria (European marram grass)
Calamagrostis brachytricha (Korean Feather Reed Grass)
Calamagrostis breviligulata (American marram grass)
Calamagrostis canadensis (bluejoint)
Calamagrostis × 'Cheju-Do' (Cheju-Do Reed Grass)
Calamagrostis epigejos (Bushgrass)
Calamagrostis spp. (Reedgrasses)
Calamintha nepeta ssp. nepeta (calamint)
Calamintha spp.
Calamus muelleri (Wait-a-while)
Calamus spp.
Calandrinia menziesii (redmaids)
Calandrinia spp.
Calanthe spp.
Calanthe triplicata (Christmas Orchid)
Calasterella californica (California asterella)
Calasterella spp.
Calathea lancifolia (Rattlesnake Plant)
Calathea roseopicta (Calathea Medallion)
Calathea spp.
Calceolaria spp. (Slipper flowers)
Caleana major (Large Flying Duck Orchid)
Caleana spp.
Calendula spp. (marigolds)
Calla palustris (marsh calla)
Calla spp.
Calliandra eriophylla (pink fairy-duster)
Calliandra haematocephala (Pink Powder Puff)
Calliandra spp. (stickpeas)
Callianthe spp.
Callicarpa americana (American Beautyberry)
Callicarpa bodinieri (beautyberry)
Callicarpa bodinieri var. 'Profusion' (Profusion Beautyberry)
Callicarpa dichotoma (Purple Beautyberry)
Callicarpa spp. (Beautyberries)
Callicladium imponens (brocade moss)
Callicladium spp.
Callicoma serratifolia (Callicoma)
Callicoma spp.
Calliergonella cuspidata (Pointed Spear-moss)
Calliergonella spp.
Callirhoe involucrata (winecup mallow)
Callirhoe spp. (poppymallows)
Callisia repens (Turtle Vine)
Callisia spp.
Callistemon citrinus (Red Cluster Bottlebrush)
Callistemon spp.
Callistemon viminalis 'Hannah Ray' (Hannah Ray Bottlebrush)
Callistemon viminalis 'Little John' (Little John Dwarf Bottlebrush)
Callitriche spp. (Water Starworts)
Callitriche stagnalis (Pond water-starwort)
Callitris glaucophylla (White Cypress-pine)
Callitris gracilis (Slender Cypress-pine)
Callitris rhomboidea (Oyster Bay cypress-pine)
Callitris spp.
Callitropsis nootkatensis (Alaska Cedar)
Callitropsis nootkatensis 'Pendula' (weeping Alaska yellow cedar)
Callitropsis spp.
Calluna spp.
Calluna vulgaris (Scotch Heather)
Calluna vulgaris 'Firefly' (Firefly Heather)
Calluna vulgaris 'Spring Torch' (Spring Torch Heather)
Calocedrus decurrens (incense cedar)
Calocedrus spp.
Calochilus campestris (copper beard orchid)
Calochilus paludosus (red beard orchid)
Calochilus robertsonii (Purple Beard Orchid)
Calochilus spp.
Calochlaena dubia (Common Ground Fern)
Calochlaena spp.
Calochortus albus (White Globe Lily)
Calochortus amabilis (Diogenes' lantern)
Calochortus gunnisonii (Gunnison's Mariposa Lily)
Calochortus leichtlinii (Leichtlin's Mariposa Lily)
Calochortus luteus (Yellow Mariposa Lily)
Calochortus nuttallii (Sego Lily)
Calochortus splendens (Splendid Mariposa Lily)
Calochortus spp. (mariposa lilies)
Calochortus tolmiei (Tolmie's pussy ears)
Calochortus venustus (Butterfly Mariposa Lily)
Calopogon spp.
Calopogon tuberosus (Tuberous Grasspink)
Calothamnus spp.
Calotis cuneifolia (Purple Burr-daisy)
Calotis lappulacea (Bur Daisy)
Calotis spp.
Caltha palustris (marsh marigold)
Caltha spp.
Calycanthus floridus (Carolina sweetshrub)
Calycanthus occidentalis (Western Spice Bush)
Calycanthus × raulstonii (Raulston's allspice)
Calycanthus spp.
Calyptocarpus spp.
Calyptocarpus vialis (straggler daisy)
Calyptridium monospermum (One-seeded Pussypaws)
Calyptridium spp. (pussypaws)
Calystegia × lucana (Hybrid Bindweed)
Calystegia macrostegia (coast morning glory)
Calystegia purpurata (Pacific False Bindweed)
Calystegia sepium (hedge bindweed)
Calystegia silvatica (large bindweed)
Calystegia soldanella (Sea Bindweed)
Calystegia spp. (false bindweeds)
Calytrix spp.
Calytrix tetragona (Fringe Myrtle)
Camassia cusickii (Cusick's Camas)
Camassia leichtlinii (Great Camas)
Camassia leichtlinii subsp. suksdorfii
Camassia quamash (common camas)
Camassia scilloides (Atlantic camas)
Camassia spp. (camas)
Camellia japonica (Japanese camellia)
Camellia japonica 'Silver Waves' (Silver Waves Camellia)
Camellia sasanqua (sasanqua camellia)
Camellia sasanqua 'Setsugekka' (Setsugekka Camellia)
Camellia sinensis (Tea Plant)
Camellia spp. (Camellias)
Camellia vernalis 'Yuletide' (Yuletide Camellia)
Camellia williamsii 'Donation' (Donation Camellia)
Camissoniopsis bistorta (California sun cup)
Camissoniopsis cheiranthifolia (beach suncup)
Camissoniopsis spp. (Suncups)
Campanula (bellflowers)
Campanula 'Birch Hybrid' (Birch Hybrid Bellflower)
Campanula carpatica (bellflower)
Campanula garganica 'Dickson's Gold' (Dickson's Gold Bellflower)
Campanula intercedens (intermediate bellflower)
Campanula lactiflora (Milky Bellflower)
Campanula latifolia (Giant Bellflower)
Campanula patula (Spreading Bellflower)
Campanula petiolata (western harebell)
Campanula portenschlagiana (Dalmatian Bellflower)
Campanula poscharskyana (Serbian Bellflower)
Campanula poscharskyana 'Blue Waterfall' (Blue Waterfall Bellflower)
Campanula rapunculoides (Creeping Bellflower)
Campanula rotundifolia (Harebell)
Campanula spp. (bellflowers)
Campanulastrum americanum (tall bellflower)
Campanulastrum spp.
Campanula trachelium (Nettle-leaved Bellflower)
Camphora officinarum (Camphor)
Camphora spp.
Campsis spp. (trumpet vines)
Campsis × tagliabueana (Hybrid Trumpet Vine)
Campylopus introflexus (Heath Star-moss)
Campylopus spp.
Canadanthus modestus (Giant Mountain Aster)
Canadanthus spp.
Cananga odorata (Ylang-Ylang)
Cananga spp.
Canavalia rosea (Beach Bean)
Canavalia spp.
Canna glauca (Water Canna)
Canna × hybrida (Garden Canna)
Canna spp. (Canna Lilies)
Capnoides sempervirens (rock harlequin)
Capnoides spp.
Capparis arborea (Brush Caper Berry)
Capparis spp. (Caperbushes)
Capsella bursa-pastoris (shepherd's purse)
Capsella spp. (Shepherd's-purses)
Capsicum annuum 'Anaheim' (Anaheim Pepper)
Capsicum annuum 'California Wonder' (California Wonder Bell Pepper)
Capsicum annuum 'Cayenne' (Cayenne Pepper)
Capsicum annuum 'Jalapeño' (Jalapeño Pepper)
Capsicum annuum 'Poblano' (Poblano Pepper)
Capsicum annuum 'Shishito' (Shishito Pepper)
Capsicum annuum 'Shishito' (Shishito Pepper)
Capsicum annuum 'Sweet Banana' (Sweet Banana Pepper)
Capsicum annuum 'Sweet Banana' (Sweet Banana Pepper)
Capsicum chinense 'Carolina Reaper' (Carolina Reaper)
Capsicum chinense 'Habanero' (Habanero Pepper)
Capsicum spp. (peppers)
Cardamine amara (large bittercress)
Cardamine bulbosa (bulbous cress)
Cardamine californica (milkmaids)
Cardamine concatenata (cut-leaved toothwort)
Cardamine diphylla (Two-leaved Toothwort)
Cardamine douglassii (Purple Cress)
Cardamine flexuosa (wavy bittercress)
Cardamine hirsuta (shotweed)
Cardamine impatiens (narrow-leaved bittercress)
Cardamine maxima (Large Toothwort)
Cardamine nuttallii (Nuttall's toothwort)
Cardamine pensylvanica (Pennsylvania Bittercress)
Cardamine pratensis (Cuckooflower)
Cardamine spp. (Bittercresses and Toothworts)
Cardamine trifolia (toothwort)
Cardiocrinum giganteum (giant Himalayan lily)
Cardiocrinum spp.
Cardiospermum grandiflorum (Showy Balloon Vine)
Cardiospermum halicacabum (Lesser Balloon Vine)
Cardiospermum spp.
Carduus crispus (Welted Thistle)
Carduus nutans (musk thistle)
Carduus pycnocephalus (Italian thistle)
Carduus spp. (plumeless thistles)
Carduus tenuiflorus (slenderflower thistle)
Carex acutiformis (lesser pond sedge)
Carex albicans (White-Tinged Sedge)
Carex amphibola (Creek Sedge)
Carex amplifolia (Bigleaf Sedge)
Carex appalachica (Appalachian Sedge)
Carex appressa (Southern Cutty Sedge)
Carex aquatilis (Sitka Aquatic Sedge)
Carex arenaria (sand sedge)
Carex bicknellii (Bicknell's Sedge)
Carex blanda (eastern woodland sedge)
Carex brevior (Plains Oval Sedge)
Carex bromoides (Brome-Like Sedge)
Carex buchananii (Leatherleaf Sedge)
Carex caryophyllea (spring sedge)
Carex cherokeensis (Cherokee Sedge)
Carex comans (Hair Sedge)
Carex comosa (Longhair Sedge)
Carex crinita (Fringed Sedge)
Carex declinata (Drooping Sedge)
Carex decomposita (Cypress-Knee Sedge)
Carex densa (Dense Sedge)
Carex deweyana (Dewey's Sedge)
Carex divulsa (Berkeley Sedge)
Carex eburnea (Ivory Sedge)
Carex elata 'Aurea' (Bowles' Golden Sedge)
Carex elongata (elongated sedge)
Carex firma (firm sedge)
Carex flacca (Blue Sedge)
Carex flaccosperma (Blue Wood Sedge)
Carex frankii (Frank's Sedge)
Carex grayi (Gray's Sedge)
Carex hirta (hairy sedge)
Carex 'Ice Dance' (Ice Dance Sedge)
Carex intumescens (bladder sedge)
Carex leavenworthii (Leavenworth's Sedge)
Carex lupulina (hop sedge)
Carex lurida (sallow sedge)
Carex lyngbyei (Lyngby's sedge)
Carex mertensii (Merten's Sedge)
Carex morrowii 'Silver Sceptre' (Silver Sceptre Japanese Sedge)
Carex morrowii 'Variegata' (Japanese Sedge)
Carex muskingumensis (Palm Sedge)
Carex muskingumensis 'Ice Fountains' (Ice Fountains Palm Sedge)
Carex nigra (smooth black sedge)
Carex obnupta (slough sedge)
Carex ornithopoda 'Aurea' (Golden Bird's Foot Sedge)
Carex ornithopoda 'Variegata' (Variegated Bird's Foot Sedge)
Carex oshimensis 'Evergold' (Evergold Japanese Sedge)
Carex otrubae (False Fox-sedge)
Carex pallescens (pale sedge)
Carex panicea (grass-like sedge)
Carex pendula (Hanging sedge)
Carex pensylvanica
Carex pensylvanica (Pennsylvania Sedge)
Carex plantaginea (Plantain-Leaved Sedge)
Carex praegracilis (Clustered Field Sedge)
Carex radiata (Eastern Star Sedge)
Carex remota (Remote Sedge)
Carex riparia (greater pond sedge)
Carex scaposa (Pink-Flowered Sedge)
Carex 'Silver Sceptre' (Silver Sceptre Sedge)
Carex spp. (true sedges)
Carex sprengelii (Sprengel's Sedge)
Carex squarrosa (Squarrose Sedge)
Carex stipata (sawbeak sedge)
Carex stricta (Tussock Sedge)
Carex sylvatica (European Woodland Sedge)
Carex testacea (orange New Zealand sedge)
Carex testacea 'Prairie Fire' (Prairie Fire Sedge)
Carex texensis (Texas Sedge)
Carex umbrosa (shade sedge)
Carex vulpina (fox sedge)
Carex vulpinoidea (Fox Sedge)
Carex woodii (Wood's Sedge)
Carica papaya (Papaya)
Carica spp. (Papaya)
Carissa macrocarpa (Natal Plum)
Carissa ovata (conkerberry)
Carissa spp. (Num-nums)
Carlina spp. (Carline Thistles)
Carlina vulgaris (Carline Thistle)
Carnegiea gigantea (saguaro)
Carnegiea spp.
Carpenteria spp.
Carphephorus corymbosus (coastalplain chaffhead)
Carphephorus spp.
Carpinus betulus (European Hornbeam)
Carpinus betulus 'Fastigiata' (narrow European hornbeam)
Carpinus caroliniana (American Hornbeam)
Carpinus cordata (Heartleaf Hornbeam)
Carpinus japonica (Japanese Hornbeam)
Carpinus spp. (hornbeams)
Carpobrotus chilensis (Chilean sea fig)
Carpobrotus edulis (sea fig)
Carpobrotus glaucescens (Angular Sea-fig)
Carpobrotus rossii (Australian Pig Face)
Carpobrotus spp. (sea figs)
Carya cordiformis (bitternut hickory)
Carya glabra (pignut hickory)
Carya illinoinensis (pecan)
Carya ovata (shagbark hickory)
Carya spp. (hickories)
Carya tomentosa (mockernut)
Caryopteris spp.
Caryota spp. (Fishtail palms)
Cascabela spp.
Cassia × nealiae (rainbow shower tree)
Cassia spp.
Cassinia aculeata (Australian Tauhinu)
Cassinia longifolia (Shiny Cassinia)
Cassinia sifton (Sifton Bush)
Cassinia spp.
Cassytha filiformis (laurel dodder)
Cassytha glabella (Slender Devil's Twine)
Cassytha melantha (Coarse Dodder-laurel)
Cassytha pubescens (Downy Dodder-laurel)
Cassytha spp.
Castanea dentata (American chestnut)
Castanea mollissima (Chinese Chestnut)
Castanea sativa (Sweet Chestnut)
Castanopsis cuspidata (Japanese Chinquapin)
Castanopsis spp.
Castanospermum australe (Blackbean)
Castanospermum spp.
Castilleja affinis (Coast Paintbrush)
Castilleja applegatei (wavyleaf paintbrush)
Castilleja chromosa (Desert Paintbrush)
Castilleja coccinea (Painted-cup paintbrush)
Castilleja exserta (purple owl's-clover)
Castilleja foliolosa (woolly paintbrush)
Castilleja hispida (harsh paintbrush)
Castilleja indivisa (Texas Paintbrush)
Castilleja integra (Wholeleaf Paintbrush)
Castilleja linariifolia (Wyoming Paintbrush)
Castilleja miniata (Common Paintbrush)
Castilleja rhexiifolia (Rhexia-leaved paintbrush)
Castilleja spp. (Paintbrushes)
Casuarina cunninghamiana (River sheoak)
Casuarina equisetifolia (Beach Sheoak)
Casuarina glauca (Swamp sheoak)
Casuarina spp. (she-oaks)
Catalpa (Catalpas)
Catalpa bignonioides 'Aurea' (Golden Indian Bean Tree)
Catalpa bignonioides 'Nana' (Umbrella Catalpa)
Catalpa speciosa (Northern Catalpa)
Catalpa spp. (catalpa)
Catananche spp.
Catapodium rigidum (Fern-grass)
Catapodium spp.
Catharanthus roseus (Vinca / Periwinkle)
Catharanthus spp. (Periwinkle)
Cattleya spp.
Caulerpa spp.
Caulophyllum giganteum (early blue cohosh)
Caulophyllum spp. (blue cohoshes)
Caulophyllum thalictroides (Blue Cohosh)
Causonis clematidea (Slender Grape)
Causonis spp.
Caustis flexuosa (Curly Wig)
Caustis spp.
Cautleya spp.
Cavendishia spp.
Ceanothus americanus (New Jersey tea)
Ceanothus cordulatus (mountain whitethorn)
Ceanothus cuneatus (Buckbrush)
Ceanothus gloriosus (Point Reyes ceanothus)
Ceanothus gloriosus var. porrectus (ceanothus-gloriosus-var-porrectus)
Ceanothus integerrimus (deerbrush ceanothus)
Ceanothus leucodermis (chaparral whitethorn)
Ceanothus prostratus (Mahala mat)
Ceanothus spp. (Ceanothus)
Ceanothus thyrsiflorus (Blue Blossom)
Ceanothus velutinus (Snowbrush)
Ceanothus 'Victoria' (Victoria ceanothus)
Cecropia spp. (Cecropias)
Cedrus atlantica (Atlas Cedar)
Cedrus atlantica 'Glauca' (blue Atlas cedar)
Cedrus atlantica 'Glauca Fastigiata' (narrow blue Atlas cedar)
Cedrus atlantica 'Glauca Pendula' (weeping blue Atlas cedar)
Cedrus deodara (deodar cedar)
Cedrus libani (cedar of Lebanon)
Cedrus spp. (Cedars)
Ceiba speciosa (Pink Silk Floss Tree)
Ceiba spp.
Celastrus orbiculatus (Asian bittersweet)
Celastrus scandens (American bittersweet)
Celastrus spp. (bittersweets)
Celosia argentea (Cockscomb)
Celosia spp. (Cockscombs)
Celtis (hackberries)
Celtis laevigata (sugar hackberry)
Celtis occidentalis (common hackberry)
Celtis pallida (spiny hackberry)
Celtis reticulata (netleaf hackberry)
Celtis sinensis (Chinese Hackberry)
Cenchrus ciliaris (buffelgrass)
Cenchrus clandestinus (Kikuyu Grass)
Cenchrus × cupreus (purple fountain grass)
Cenchrus setaceus (Fountain Grass)
Cenchrus spinifex (coastal sandbur)
Cenchrus spp. (sandburs and fountain grasses)
Cenolophium denudatum
Cenolophium spp.
Centaurea cyanus (Cornflower)
Centaurea debeauxii (Chalk Knapweed)
Centaurea diffusa (diffuse knapweed)
Centaurea jacea (Brown Knapweed)
Centaurea melitensis (Maltese star-thistle)
Centaurea × moncktonii (Monckton's Knapweed)
Centaurea montana (Perennial Cornflower)
Centaurea nigra (black knapweed)
Centaurea nigrescens (meadow knapweed)
Centaurea scabiosa (Greater Knapweed)
Centaurea solstitialis (Yellow Star-Thistle)
Centaurea spp. (knapweeds)
Centaurea stoebe (spotted knapweed)
Centaurium erythraea (Common centaury)
Centaurium pulchellum (Lesser Centaury)
Centaurium spp. (Centauries)
Centaurium tenuiflorum (Slender Centaury)
Centella asiatica (Indian pennywort)
Centella spp. (Pennywort)
Centranthus ruber (Red Valerian)
Centranthus spp. (Valerian)
Centropogon spp.
Centrosema spp. (Butterfly Peas)
Centrosema virginianum (butterfly pea)
Cephalanthera damasonium (white helleborine)
Cephalanthera spp.
Cephalanthus occidentalis (Buttonbush)
Cephalanthus spp.
Cephalaria gigantea (Giant Scabious)
Cephalaria spp.
Cephalocereus senilis (Old Man Cactus)
Cephalocereus spp.
Cephalotaxus fortunei (Chinese Plum Yew)
Cephalotaxus harringtonia (Japanese Plum Yew)
Cephalotaxus harringtonia (Japanese Plum Yew)
Cephalotaxus spp.
Ceramium spp. (Banded Weeds)
Cerastium arvense (field chickweed)
Cerastium fontanum subsp. vulgare (mouse-ear chickweed)
Cerastium glomeratum (Sticky mouse-ear chickweed)
Cerastium spp. (Mouse-ear Chickweeds)
Ceratiola ericoides (Florida rosemary)
Ceratiola spp.
Ceratocapnos claviculata (Climbing Corydalis)
Ceratocapnos spp.
Ceratodon purpureus (Redshank)
Ceratodon spp.
Ceratopetalum apetalum (coachwood)
Ceratopetalum gummiferum (New South Wales christmas bush)
Ceratopetalum spp.
Ceratophyllum demersum (coontail)
Ceratophyllum spp.
Ceratostigma plumbaginoides (Leadwort)
Ceratostigma spp.
Ceratostigma willmottianum (Chinese Plumbago)
Cercidiphyllum japonicum (katsura)
Cercidiphyllum japonicum 'Pendulum' (weeping katsura)
Cercidiphyllum spp.
Cercis canadensis (redbud)
Cercis canadensis 'Covey' (Lavender Twist Weeping Redbud Tree)
Cercis canadensis 'Forest Pansy' (Forest Pansy redbud)
Cercis chinensis 'Avondale' (Avondale Chinese Redbud)
Cercis occidentalis (Western Redbud)
Cercis racemosa (Chain-flowered Redbud)
Cercis siliquastrum (Judas-tree)
Cercis spp. (redbuds)
Cercocarpus betuloides (Birchleaf Mountain Mahogany)
Cercocarpus ledifolius (Mountain Mahogany)
Cercocarpus montanus (Alderleaf Mountain Mahogany)
Cercocarpus spp. (mountain mahoganies)
Cereus spp.
Cerinthe spp.
Ceropegia spp.
Ceropegia woodii (String of Hearts)
Cestrum spp. (cestrums)
Chaenactis douglasii (Hoary Pincushion)
Chaenactis fremontii (Fremont's pincushion)
Chaenactis glabriuscula (Common Yellow Chaenactis)
Chaenactis spp. (pincushion plants)
Chaenomeles speciosa (flowering quince)
Chaenomeles spp. (Flowering quinces)
Chaenostoma spp. (Skunkbushes)
Chaerophyllum spp.
Chaerophyllum tainturieri (Tainturier's chervil)
Chaerophyllum temulum (Rough chervil)
Chaetopappa ericoides (Rose Heath)
Chaetopappa spp.
Chamaebatia foliolosa (Mountain Misery)
Chamaebatia spp.
Chamaecrista fasciculata (partridge pea)
Chamaecrista nictitans (sensitive pea)
Chamaecrista spp. (sensitive and partridge peas)
Chamaecyparis lawsoniana (Lawson Cypress)
Chamaecyparis lawsoniana 'Glauca' (Blue Lawson Cypress)
Chamaecyparis obtusa (Hinoki Cypress)
Chamaecyparis obtusa 'Filicoides' (Fernspray Hinoki Cypress)
Chamaecyparis obtusa 'Gracilis' (Slender Hinoki Cypress)
Chamaecyparis obtusa 'Kosteri' (Koster's Hinoki Cypress)
Chamaecyparis obtusa 'Nana' (Dwarf Hinoki Cypress)
Chamaecyparis obtusa 'Nana Gracilis' (Dwarf Hinoki Cypress)
Chamaecyparis pisifera (Sawara Cypress)
Chamaecyparis pisifera 'Filifera' (Thread Cypress)
Chamaecyparis pisifera 'Filifera Aurea' (Golden Thread Cypress)
Chamaecyparis pisifera 'Filifera Aurea Nana' (Dwarf Golden Thread Cypress)
Chamaecyparis pisifera 'Golden Mop' (Golden Mop Cypress)
Chamaecyparis pisifera 'Sungold' (Sungold Falsecypress)
Chamaecyparis spp. (False Cypress)
Chamaedaphne calyculata (leatherleaf)
Chamaedaphne spp.
Chamaedorea cataractarum (Cat Palm)
Chamaedorea elegans (Parlor Palm)
Chamaedorea seifrizii (Bamboo Palm)
Chamaedorea spp.
Chamaenerion angustifolium (Fireweed)
Chamaenerion spp.
Chamaerops humilis (European Fan Palm)
Chamaerops spp.
Chamaescilla corymbosa (Blue Stars)
Chamaescilla spp.
Chamerion angustifolium (fireweed)
Chamerion spp.
Chara spp. (muskgrass)
Chasmanthium latifolium (Northern Sea Oats)
Chasmanthium laxum (Slender Woodoats)
Chasmanthium spp.
Cheilanthes austrotenuifolia (Rock Fern)
Cheilanthes lanosa
Cheilanthes sieberi (cloak fern)
Cheilanthes spp. (Lip Ferns)
Chelidonium diphyllum (Celandine Poppy)
Chelidonium majus (Greater celandine)
Chelidonium spp.
Chelone glabra (White Turtlehead)
Chelone lyonii (pink turtlehead)
Chelone obliqua (Rose Turtlehead)
Chelone spp.
Chelonopsis spp.
Chelonopsis yagiharana (Yagihara Chelonopsis)
Chenopodiastrum murale (nettle-leaved goosefoot)
Chenopodiastrum spp. (maple and nettle-leaved goosefoots)
Chenopodium album (lambsquarters)
Chenopodium nutans (Climbing saltbush)
Chenopodium parabolicum (Fragrant Saltbush)
Chenopodium robertianum (Saloop)
Chenopodium spp. (Goosefoots)
Chiloglottis spp.
Chiloglottis valida (large bird-orchid)
Chilopsis linearis (desert willow)
Chilopsis spp.
Chimaphila maculata (striped wintergreen)
Chimaphila spp.
Chimaphila umbellata (pipsissewa)
Chimonanthus praecox (Wintersweet)
Chimonanthus spp.
Chionanthus retusus (Chinese Fringetree)
Chionanthus spp. (fringetrees and allies)
Chionanthus virginicus (White Fringetree)
Chionochloa rubra (Red Tussock Grass)
Chionochloa spp.
Chionodoxa luciliae (Glory of the Snow)
Chionodoxa spp.
Chloranthus fortunei
Chloranthus spp.
Chloris gayana (Rhodes Grass)
Chloris spp. (windmill grasses)
Chloris × subdolichostachya (shortspike windmill grass)
Chloris truncata (black windmill grass)
Chlorogalum pomeridianum (wavy-leafed soap plant)
Chlorogalum spp.
Chlorophytum comosum (Spider Plant)
Chlorophytum spp. (Grass Lilies)
Choisya 'Aztec Pearl' (Mexican Orange Blossom)
Choisya spp.
Choisya ternata (Mexican Orange Blossom)
Choisya ternata 'Sundance' (Golden Mexican Orange Blossom)
Chondrus crispus (Irish Moss)
Chondrus spp.
Chorispora spp.
Chorispora tenella (crossflower)
Chorizanthe rigida (Devil's Spineflower)
Chorizanthe spp.
Christella dentata (Soft Fern)
Christella spp.
Chromolaena odorata (Siam weed)
Chromolaena spp.
Chrozophora spp.
Chrozophora tinctoria (dyer's croton)
Chrysanthemum (chrysanthemums)
Chrysanthemum × morifolium (Garden Mum)
Chrysanthemum spp. (Mammoth Mums Collection)
Chrysobalanus icaco (Cocoplum)
Chrysobalanus spp.
Chrysocephalum baxteri (Fringed Everlasting)
Chrysocephalum semipapposum (clustered everlasting)
Chrysocephalum spp.
Chrysogonum spp.
Chrysogonum virginianum (northern green-and-gold)
Chrysolepis chrysophylla (Golden Chinquapin)
Chrysolepis sempervirens (bush chinquapin)
Chrysolepis spp.
Chrysopsis mariana (Maryland golden-aster)
Chrysopsis spp.
Chrysosplenium oppositifolium (Opposite-leaved Golden-saxifrage)
Chrysosplenium spp.
Chrysothamnus spp.
Chrysothamnus viscidiflorus (Yellow Rabbitbrush)
Chusquea culeou (Chilean Bamboo)
Chusquea spp.
Chylismia brevipes (Golden Suncup)
Chylismia claviformis (Browneyes)
Chylismia spp.
Cicerbita macrophylla (Common Blue-sow-thistle)
Cicerbita spp.
Cichorium intybus (chicory)
Cichorium spp. (chicories and endives)
Cicuta maculata (water hemlock)
Cicuta spp.
Cimicifuga racemosa (black bugbane)
Cinnamomum spp.
Cinnamomum verum (True Cinnamon)
Circaea alpina (Alpine Enchanter's-nightshade)
Circaea canadensis (broadleaf enchanter's nightshade)
Circaea lutetiana (enchanter's-nightshade)
Circaea spp. (enchanter's nightshades)
Cirsium acaulon (Stemless Thistle)
Cirsium altissimum (Tall Thistle)
Cirsium arvense (Canada thistle)
Cirsium discolor (field thistle)
Cirsium heterophyllum (Melancholy Thistle)
Cirsium horridulum (bristle thistle)
Cirsium neomexicanum (New Mexico thistle)
Cirsium occidentale (Cobwebby Thistle)
Cirsium palustre (Marsh Thistle)
Cirsium rivulare
Cirsium spp. (Plume Thistles)
Cirsium texanum (Texas Thistle)
Cirsium undulatum (wavyleaf thistle)
Cirsium vulgare (bull thistle)
Cissus spp. (Treebine)
Cissus trifoliata (sorrelvine)
Cistanthe spp. (pussy paws)
Cistus albidus (white-leaved cistus)
Cistus creticus
Cistus × incanus (Magenta Rockrose)
Cistus ladanifer (Gum Rockrose)
Cistus laurifolius (laurel-leaved cistus)
Cistus purpureus (Purple Rock Rose)
Cistus spp. (Shrubby Rock-roses)
Cistus x hybridus (White Rockrose)
Cistus x purpureus (Orchid Rockrose)
Cistus x skanbergii
Citrullus lanatus 'Sugar Baby' (Sugar Baby Watermelon)
Citrullus spp.
Citrus × aurantium (Orange)
Citrus australasica (Finger Lime)
Citrus × floridana (Limequat)
Citrus limon 'Ponderosa' (Ponderosa Lemon)
Citrus × meyeri (Meyer Lemon)
Citrus × microcarpa (Calamansi)
Citrus reticulata 'Dancy' (Dancy Tangerine)
Citrus spp. (citrus)
Citrus trifoliata (trifoliate orange)
Citrus unshiu 'Owari' (Owari Satsuma Mandarin)
Cladophora spp.
Cladrastis kentukea (American Yellowwood)
Cladrastis spp.
Claoxylon australe (Brittlewood)
Claoxylon spp.
Clarkia amoena (Farewell-To-Spring)
Clarkia purpurea (Winecup Clarkia)
Clarkia rhomboidea (diamond clarkia)
Clarkia rubicunda (ruby chalice clarkia)
Clarkia spp. (Clarkias)
Clarkia unguiculata (Elegant Clarkia)
Claytonia caroliniana (Carolina Springbeauty)
Claytonia lanceolata (Lanceleaf Springbeauty)
Claytonia parviflora (Streambank Springbeauty)
Claytonia perfoliata (Miner's Lettuce)
Claytonia rubra (Redstem Springbeauty)
Claytonia sibirica (Siberian miner's-lettuce)
Claytonia spp. (spring beauties)
Claytonia virginica (Virginia Springbeauty)
Clematicissus opaca (Pepper Vine)
Clematicissus spp.
Clematis (Clematis and leatherflowers)
Clematis 'Alionushka' (Alionushka Clematis)
Clematis × 'Arabella' (Arabella Clematis)
Clematis aristata (Australian Clematis)
Clematis armandii (Armand Clematis)
Clematis × 'Asao' (Asao Clematis)
Clematis 'Betty Corning' (Betty Corning Clematis)
Clematis cirrhosa (early clematis)
Clematis 'Constance' (Constance Clematis)
Clematis × 'Dr. Ruppel' (Dr. Ruppel Clematis)
Clematis drummondii (Old Man's Beard Clematis)
Clematis 'Duchess of Albany' (Duchess of Albany Clematis)
Clematis 'Duchess of Edinburgh' (Duchess of Edinburgh Clematis)
Clematis durandii (Durand's Clematis)
Clematis 'Etoile Violette' (Etoile Violette Clematis)
Clematis glycinoides (Headache Vine)
Clematis × 'Henryi' (Henryi Clematis)
Clematis 'Jackmanii' (Jackman Clematis)
Clematis lasiantha (Pipestem Clematis)
Clematis ligusticifolia (Western White Clematis)
Clematis 'Madame Julia Correvon' (Madame Julia Correvon)
Clematis microphylla (Small-leaved Clematis)
Clematis montana var. 'Tetrarose' (Tetrarose Clematis)
Clematis × 'Niobe' (Niobe Clematis)
Clematis patens (spreading clematis)
Clematis × 'Pink Champagne' (Pink Champagne Clematis)
Clematis pitcheri (Pitcher's leatherflower)
Clematis 'Polish Spirit' (Polish Spirit Clematis)
Clematis pubescens (Common Clematis)
Clematis × 'Rebecca' (Rebecca Clematis)
Clematis × 'Sapphire Indigo' (Sapphire Indigo Clematis)
Clematis spp. (clematis)
Clematis terniflora (Sweet Autumn Clematis)
Clematis virginiana (virgin's-bower)
Clematis vitalba (travelers-joy)
Cleome hassleriana (Spider Flower)
Cleome houtteana (Spider flower)
Cleomella arborea (Bladderpod)
Cleomella serrulata (Rocky Mountain Beeplant)
Cleomella spp.
Cleome spp. (Spider Flowers)
Clerodendrum floribundum (Lolly Bush)
Clerodendrum × speciosum (Red Bleeding Heart Vine)
Clerodendrum spp. (Glorybowers)
Clerodendrum tomentosum (Downy Chance)
Clerodendrum trichotomum (harlequin glorybower)
Clethra alnifolia (summersweet, sweet pepperbush)
Clethra alnifolia 'Hummingbird' (Hummingbird Summersweet)
Clethra spp.
Cliffortia spp. (Caperoses)
Climacium americanum (American Tree Moss)
Climacium spp. (Climacium Mosses)
Clinopodium douglasii (Yerba Buena)
Clinopodium spp. (Calamints)
Clinopodium vulgare (Wild Basil)
Clintonia andrewsiana (Andrews' Clintonia)
Clintonia borealis (bluebead lily)
Clintonia spp.
Clintonia uniflora (bead lily)
Clitoria mariana (Pigeonwings)
Clitoria spp.
Clivia spp. (Bush Lilies)
Clusia rosea (Autograph Tree)
Clusia spp. (attorney trees)
Cnidoscolus spp.
Cnidoscolus stimulosus (spurge nettle)
Cnidoscolus texanus (Texas Bull Nettle)
Coccoloba spp.
Coccoloba uvifera (Sea Grape)
Cochemiea dioica (Peninsular fishhook cactus)
Cochemiea grahamii (Graham's nipple cactus)
Cochemiea spp.
Cochlearia danica (Danish Scurvy-grass)
Cochlearia officinalis (Scurvy grass)
Cochlearia spp. (Scurvygrasses)
Cocos nucifera (Coconut Palm)
Cocos spp. (Coconut Palms)
Codiaeum spp.
Codium fragile (Dead Man's Fingers)
Codium spp. (Codiums)
Coffea arabica (Coffee Plant)
Coffea spp. (Coffees)
Colchicum autumnale (Autumn Crocus)
Colchicum spp. (Naked Ladies)
Colchicum 'Waterlily' (Waterlily Autumn Crocus)
Coleus australis (little spurflower)
Coleus scutellarioides (Coleus)
Collinsia heterophylla (Purple Chinese Houses)
Collinsia parviflora (small-flowered blue-eyed mary)
Collinsia spp. (Blue-eyed Marys)
Collinsonia canadensis (citronella horse balm)
Collinsonia spp.
Collomia grandiflora (grand collomia)
Collomia spp.
Colocasia esculenta (Taro)
Colocasia spp. (Elephant ears)
Columnea spp. (Columnea)
Comandra spp.
Comandra umbellata (bastard toadflax)
Comarum palustre (marsh cinquefoil)
Comarum spp.
Combretum rotundifolium (Monkey's Brush Plant)
Combretum spp. (Bushwillows)
Comesperma calymega (Blue Spike Milkwort)
Comesperma ericinum (Pink Matchheads)
Comesperma spp.
Comesperma volubile (Love Creeper)
Commelina communis (Asiatic dayflower)
Commelina cyanea (scurvy weed)
Commelina dianthifolia (Birdbill Dayflower)
Commelina diffusa (climbing dayflower)
Commelina erecta (whitemouth dayflower)
Commelina spp. (dayflowers)
Commelina virginica (Virginia Dayflower)
Commersonia bartramia (Brown Kurrajong)
Commersonia spp.
Comptonia peregrina (Sweet Fern)
Comptonia spp.
Condalia hookeri (Brasil)
Condalia spp.
Condaliopsis obtusifolia (lotebush)
Condaliopsis spp.
Condea emoryi (desert lavender)
Condea spp.
Conium maculatum (poison hemlock)
Conium spp.
Conocarpus erectus (Green Buttonwood)
Conocarpus spp.
Conocephalum conicum (Great Scented Liverwort)
Conocephalum salebrosum (Snakewort)
Conocephalum spp. (snakeworts)
Conoclinium coelestinum (Blue Mistflower)
Conoclinium dissectum (Palmleaf Mistflower)
Conoclinium spp. (mistflowers)
Conopholis americana (American cancer-root)
Conopholis spp.
Conopodium majus (Pignut)
Conopodium spp.
Conospermum longifolium (Smoke Bush)
Conospermum spp.
Conospermum taxifolium (Paint Brush)
Convallaria majalis (lily of the valley)
Convallaria spp. (lilies of the valley)
Convolvulus angustissimus (Blushing Bindweed)
Convolvulus arvensis (field bindweed, morning glory)
Convolvulus equitans (Texas bindweed)
Convolvulus spp. (bindweeds)
Conyza spp.
Coprosma hirtella (Rough Coprosma)
Coprosma quadrifida (Prickly Currant-Bush)
Coprosma repens (Taupata)
Coprosma spp. (Coprosma)
Coptis spp.
Coptis trifolia (threeleaf goldthread)
Corallina officinalis (Common Coralline)
Corallina spp.
Corallorhiza maculata (spotted coralroot)
Corallorhiza mertensiana (Pacific coralroot)
Corallorhiza spp. (Coralroots)
Cordia boissieri (Anacahuita)
Cordia spp.
Cordyline australis (New Zealand cabbage tree)
Cordyline fruticosa (Ti Plant)
Cordyline petiolaris (Broad leaved Palm Lily)
Cordyline rubra (red-fruited palm lily)
Cordyline spp. (cabbage trees and allies)
Cordyline stricta (Slender Palm Lily)
Coreopsis (Tickseed)
Coreopsis grandiflora 'Early Sunrise' (Early Sunrise Coreopsis)
Coreopsis lanceolata (Lance-Leaved Coreopsis)
Coreopsis leavenworthii (Leavenworth's Tickseed)
Coreopsis 'Limerock Ruby' (Limerock Ruby Coreopsis)
Coreopsis major (Greater Tickseed)
Coreopsis palmata (Stiff Tickseed)
Coreopsis rosea (Pink Tickseed)
Coreopsis tinctoria (plains coreopsis)
Coreopsis tripteris (Tall Coreopsis)
Coreopsis verticillata 'Grandiflora' (Large-flowered Tickseed)
Coreopsis verticillata 'Moonbeam' (Moonbeam coreopsis, tickseed)
Coreopsis verticillata 'Zagreb' (Zagreb Coreopsis)
Corethrogyne filaginifolia (California Aster)
Corethrogyne spp.
Coriandrum sativum (Cilantro)
Coriandrum spp.
Cornus alba 'Elegantissima' (variegated Tartarian dogwood)
Cornus alba 'Kesselringii' (Kesselring's Dogwood)
Cornus alternifolia (Pagoda Dogwood)
Cornus amomum (silky dogwood)
Cornus canadensis (bunchberry)
Cornus capitata (Mountain Moon Dogwood Tree)
Cornus controversa 'Variegata' (Variegated Giant Dogwood)
Cornus drummondii (roughleaf dogwood)
Cornus 'Eddie's White Wonder' (Eddie's White Wonder)
Cornus florida (eastern dogwood)
Cornus florida 'Cherokee Brave' (Cherokee Brave Dogwood)
Cornus florida 'Cherokee Chief' (Cherokee Chief Dogwood)
Cornus florida 'Cherokee Princess' (Cherokee Princess Dogwood)
Cornus hongkongensis
Cornus kousa (kousa dogwood)
Cornus kousa 'Satomi' (Satomi Kousa Dogwood)
Cornus macrophylla (Large-leaved Dogwood)
Cornus mas (Cornelian cherry)
Cornus nuttallii (western dogwood, Pacific dogwood)
Cornus racemosa (Grey Twig Dogwood)
Cornus sanguinea
Cornus sericea (red twig dogwood, red osier)
Cornus sericea 'Baileyi' (Bailey's Red-twig Dogwood)
Cornus sericea 'Flaviramea' (yellow twig dogwood)
Cornus sericea 'Kelseyi' (dwarf red twig dogwood)
Cornus spp. (dogwoods)
Cornus unalaschkensis (bunchberry)
Corokia cotoneaster (Wire-netting Bush)
Corokia spp.
Coronidium elatum (white paper daisy)
Coronidium scorpioides (button everlasting)
Coronidium spp.
Coronilla spp.
Correa alba (White Correa)
Correa glabra (rock correa)
Correa reflexa (Common Correa)
Correa spp.
Cortaderia selloana (Pampas Grass)
Cortaderia selloana 'Pumila' (Dwarf Pampas Grass)
Cortaderia spp. (Pampas grasses)
Corybas aconitiflorus (Spurred Helmet-orchid)
Corybas diemenicus (veined helmet-orchid)
Corybas incurvus (slaty helmet-orchid)
Corybas spp. (Helmet orchids)
Corydalis (fumewort)
Corydalis aurea (golden corydalis)
Corydalis flavula (Yellow Corydalis)
Corydalis scouleri (Scouler's fumewort)
Corydalis solida (Bird-in-a-bush)
Corylopsis glabrescens (Fragrant Winter Hazel)
Corylopsis pauciflora (winter hazel, buttercup winter hazel)
Corylopsis sinensis (Chinese Winter Hazel)
Corylopsis spicata (Spike Winter Hazel)
Corylopsis spp.
Corylus americana (American Hazelnut)
Corylus avellana
Corylus avellana 'Contorta' (Harry Lauder's walking stick)
Corylus colurna (Turkish Hazelnut)
Corylus cornuta (hazel)
Corylus cornuta var. californica (western hazelnut)
Corylus maxima 'Purpurea' (purple‑leaf filbert)
Corylus spp. (hazels)
Corymbia calophylla (Marri)
Corymbia citriodora (Lemon-scented gum)
Corymbia ficifolia (Red-flowering gum)
Corymbia gummifera (Red Bloodwood)
Corymbia intermedia (Pink Bloodwood)
Corymbia maculata (Spotted Gum)
Corymbia spp. (Bloodgums)
Corymbia tessellaris (Carbeen)
Corymbia torelliana (cadaghi)
Corymbia variegata (Northern Spotted Gum)
Cosmos atrosanguineus (chocolate cosmos)
Cosmos bipinnatus (cosmos)
Cosmos spp. (Cosmoses)
Cosmos sulphureus (Yellow Cosmos)
Costus spp. (spiral gingers)
Cotinus coggygria (smoke tree, smoke bush)
Cotinus coggygria 'Ancot' (Golden Spirit Smoke Tree)
Cotinus coggygria Purpureus Group (purple-leaf smoke tree/bush)
Cotinus coggygria 'Royal Purple' (Royal Purple Smoke Tree)
Cotinus 'Grace' (Grace smoke tree)
Cotinus obovatus (American Smoke Tree)
Cotinus spp. (smoketrees)
Cotoneaster adpressus 'Little Gem' (Little Gem Cotoneaster)
Cotoneaster bullatus (hollyberry cotoneaster)
Cotoneaster buxifolius (Boxwood Cotoneaster)
Cotoneaster coriaceus (Parney cotoneaster)
Cotoneaster dammeri (Bearberry Cotoneaster)
Cotoneaster franchetii (Franchet cotoneaster)
Cotoneaster glaucophyllus (Bright bead cotoneaster)
Cotoneaster hodjingensis (Hjelmqvist Cotoneaster)
Cotoneaster horizontalis (rock cotoneaster)
Cotoneaster rehderi (Bullate Cotoneaster)
Cotoneaster salicifolius (Willow-leaved Cotoneaster)
Cotoneaster salicifolius 'Repens' (creeping willowleaf cotoneaster)
Cotoneaster simonsii (Himalayan cotoneaster)
Cotoneaster spp. (Cotoneasters)
Cotoneaster × suecicus (Swedish Cotoneaster)
Cotula australis (Common Cotula)
Cotula coronopifolia (brass buttons)
Cotula spp.
Crambe maritima (Sea Kale)
Crambe spp.
Craspedia spp.
Craspedia variabilis (Common Billy buttons)
Crassocephalum crepidioides (redflower ragleaf)
Crassocephalum spp.
Crassula connata (sand pygmyweed)
Crassula decumbens (Scilly Pigmyweed)
Crassula helmsii (New Zealand pygmyweed)
Crassula ovata (Jade Plant)
Crassula sieberiana (Australian Stonecrop)
Crassula spp. (Stonecrops)
Crataegus douglasii (Black Hawthorn)
Crataegus gaylussacia (Suksdorf's Hawthorn)
Crataegus germanica (Medlar)
Crataegus laevigata (English Hawthorn)
Crataegus laevigata 'Paul's Scarlet' (Paul's Scarlet hawthorn)
Crataegus marshallii (parsley hawthorn)
Crataegus monogyna (common hawthorn)
Crataegus mordenensis (Morden Hawthorn)
Crataegus phaenopyrum (Washington thorn)
Crataegus spp. (hawthorns)
Crataegus x lavallei (Lavalle hawthorn)
Crepis biennis (Rough Hawk's-beard)
Crepis spp. (hawksbeards)
Crepis vesicaria (Beaked Hawksbeard)
Crinum × amabile (Giant Spider Lily)
Crinum americanum (Southern Swamp Crinum)
Crinum pedunculatum (mangrove lily)
Crinum spp. (Swamplilies)
Crithmum maritimum (rock samphire)
Crithmum spp.
Crocanthemum scoparium (peak rushrose)
Crocanthemum spp. (Frostweeds)
Crocosmia (Montbretias)
Crocosmia 'Lucifer' (Lucifer Crocosmia)
Crocosmia spp. (crocosmia)
Crocosmia x crocosmiiflora 'Lucifer' (red crocosmia)
Crocus neapolitanus (spring crocus)
Crocus × stellaris (Dutch Yellow Crocus)
Crocus tommasinianus (Tommasini's Crocus)
Crossandra spp. (Crossandras)
Crotalaria spectabilis (Showy Rattlebox)
Crotalaria spp. (Rattlepods)
Croton californicus (California croton)
Croton glandulosus (Tropic Croton)
Croton lindheimeri (Lindheimer's Doveweed)
Croton monanthogynus (Prairie Tea)
Croton setiger (turkey mullein)
Croton spp. (Crotons)
Crowea saligna (willow-leaved crowea)
Crowea spp.
Cruciata laevipes (Crosswort)
Cruciata spp.
Cryphaea heteromalla (Lateral Cryphaea)
Cryphaea spp.
Cryptandra amara (Bitter Cryptandra)
Cryptandra spp.
Cryptandra tomentosa (prickly cryptandra)
Cryptantha intermedia (Clearwater cryptantha)
Cryptantha spp. (Annual Cryptanthas)
Cryptocarya microneura (murrogun)
Cryptocarya spp.
Cryptocarya triplinervis (Brown Laurel)
Cryptogramma crispa (parsley fern)
Cryptogramma spp.
Cryptomeria japonica (Japanese Cedar)
Cryptomeria japonica 'Black Dragon' (Black Dragon Japanese Cedar)
Cryptomeria japonica 'Cristata' (Japanese Crested Cedar)
Cryptomeria japonica 'Elegans' (Plume Cryptomeria)
Cryptomeria japonica 'Globosa Nana' (Globe Japanese Cedar)
Cryptomeria japonica 'Pygmaea' (Dwarf Japanese Cedar)
Cryptomeria japonica 'Sekkan Sugi' (Sekkan-Sugi cryptomeria)
Cryptomeria japonica 'Yoshino' (Yoshino Japanese Cedar)
Cryptomeria spp.
Cryptostylis erecta (bonnet orchid)
Cryptostylis leptochila (small tongue-orchid)
Cryptostylis spp.
Cryptostylis subulata (Large Tongue Orchid)
Cryptotaenia canadensis (honewort)
Cryptotaenia spp.
Ctenidium molluscum (Comb-moss)
Ctenidium spp.
Cucumis sativus 'Marketmore 76' (Marketmore 76 Cucumber)
Cucumis sativus 'Straight Eight' (Straight Eight Cucumber)
Cucumis sativus 'Suyo Long' (Suyo Long Cucumber)
Cucumis spp. (Melons & Cucumbers)
Cucurbita foetidissima (Buffalo Gourd)
Cucurbita maxima 'Hubbard' (Hubbard Winter Squash)
Cucurbita moschata 'Butternut' (Butternut Squash)
Cucurbita pepo 'Acorn' (Acorn Squash)
Cucurbita pepo 'Black Beauty' (Black Beauty Zucchini)
Cucurbita pepo 'Delicata' (Delicata Squash)
Cucurbita pepo 'Pattypan' (Pattypan Squash)
Cucurbita pepo 'Yellow Crookneck' (Yellow Crookneck Squash)
Cucurbita spp. (gourds)
Cunila origanoides (common dittany)
Cunila spp.
Cunninghamia lanceolata (China Fir)
Cunninghamia lanceolata 'Glauca' (Blue China Fir)
Cunninghamia spp.
Cupaniopsis anacardioides (Tuckeroo)
Cupaniopsis parvifolia (small-leaved tuckeroo)
Cupaniopsis spp.
Cuphea spp. (Cigar Plants and Allies)
Cupressus × leylandii (Leyland Cypress)
Cupressus macrocarpa 'Goldcrest' (Goldcrest Monterey Cypress)
Cupressus sempervirens (Italian Cypress)
Cupressus sempervirens 'Stricta' (Italian Cypress)
Cupressus spp. (cypresses)
Curcuma spp. (turmerics)
Cuscuta californica (California dodder)
Cuscuta epithymum (Clover Dodder)
Cuscuta spp. (dodders)
Cyanicula caerulea (blue finger-orchid)
Cyanicula sericea (Silky Blue Orchid)
Cyanicula spp.
Cyanthillium cinereum (little ironweed)
Cyanthillium spp.
Cyathea australis (rough tree-fern)
Cyathea spp. (scaly tree ferns)
Cyathophorum bulbosum (quill moss)
Cyathophorum spp.
Cycas circinalis (queen sago)
Cycas revoluta (Sago Palm)
Cycas spp.
Cyclamen coum (Spring cyclamen)
Cyclamen hederifolium (ivy-leaved cyclamen)
Cyclamen persicum (Florist's Cyclamen)
Cyclamen spp. (Cyclamen)
Cyclophyllum coprosmoides (Coast Canthium)
Cyclophyllum spp.
Cyclospermum leptophyllum (Marsh parsley)
Cyclospermum spp.
Cycnogeton procerus (Water Ribbons)
Cycnogeton spp.
Cydonia oblonga (Quince)
Cydonia spp.
Cylindropuntia acanthocarpa (Buckhorn Cholla)
Cylindropuntia bigelovii (Teddybear Cholla)
Cylindropuntia echinocarpa (Silver Cholla)
Cylindropuntia fosbergii (Mason Valley Cholla)
Cylindropuntia fulgida (Chain-fruit Cholla)
Cylindropuntia kleiniae (Klein's Cholla)
Cylindropuntia leptocaulis (Christmas cholla)
Cylindropuntia prolifera (Coast Cholla)
Cylindropuntia ramosissima (Branched Pencil Cholla)
Cylindropuntia spp. (chollas)
Cylindropuntia whipplei (Whipple's Cholla)
Cymbalaria muralis (Ivy-leaved toadflax)
Cymbalaria spp.
Cymbidium canaliculatum (Channelled boat-lip orchid)
Cymbidium madidum (Arrowroot Orchid)
Cymbidium spp. (Boat Orchids)
Cymbidium suave (Snake Orchid)
Cymbonotus preissianus (Austral bear’s-ears)
Cymbonotus spp.
Cymbopogon refractus (barbwire grass)
Cymbopogon spp. (Lemon Grasses)
Cynanchica pyrenaica (Squinancywort)
Cynanchica spp.
Cynanchum laeve (honey-vine climbing milkweed)
Cynanchum spp.
Cynara cardunculus (artichoke, cardoon)
Cynara spp.
Cynodon dactylon (Bermuda Grass)
Cynodon spp. (Bermuda Grasses)
Cynoglossum australe (Australian Hound's-tongue)
Cynoglossum officinale (hound's-tongue)
Cynoglossum spp. (Hound's-tongues)
Cynosurus cristatus (crested dogtail grass)
Cynosurus spp.
Cyperus croceus (Baldwin's Flatsedge)
Cyperus eragrostis (tall flatsedge)
Cyperus odoratus (Fragrant flatsedge)
Cyperus polystachyos (Bunchy flat-sedge)
Cyperus rotundus (Purple Nutsedge)
Cyperus spp. (Flatsedges)
Cyperus strigosus (straw-colored flatsedge)
Cypripedium
Cypripedium acaule (pink lady's slipper)
Cypripedium parviflorum (yellow lady's slipper)
Cypripedium spp. (lady's slipper)
Cyrilla racemiflora (Swamp titi)
Cyrilla spp.
Cyrtomium caryotideum (Fish-tail Holly Fern)
Cyrtomium falcatum (Japanese Holly Fern)
Cyrtomium fortunei (Fortune's Holly Fern)
Cyrtomium macrophyllum (Large-leaved Holly Fern)
Cyrtomium spp.
Cyrtostachys renda (Sealing Wax Palm)
Cyrtostachys spp.
Cyrtostylis reniformis (Gnat orchid)
Cyrtostylis robusta (large gnat-orchid)
Cyrtostylis spp.
Cystopteris bulbifera (bulblet fern)
Cystopteris fragilis (brittle bladderfern)
Cystopteris protrusa (lowland brittle fern)
Cystopteris spp. (fragile ferns)
Cytisus scoparius (Scotch broom)
Cytisus spp. (brooms)
Daboecia cantabrica (Irish Heath)
Daboecia cantabrica f. alba (White Irish Heath)
Daboecia spp.
Dactylis glomerata (orchard grass)
Dactylis spp.
Dactylorhiza fuchsii (Common Spotted Orchid)
Dactylorhiza incarnata (Early Marsh-orchid)
Dactylorhiza maculata (heath spotted orchid)
Dactylorhiza praetermissa (Southern Marsh-orchid)
Dactylorhiza purpurella (Northern Marsh-orchid)
Dactylorhiza spp. (Marsh orchids)
Dactylorhiza viridis (Frog Orchid)
Dahlia 'Cafe au Lait' (Cafe au Lait Dahlia)
Dahlia Hybrids (dahlia)
Dahlia merckii (Bedding Dahlia)
Dahlia pinnata (Garden Dahlia)
Dahlia spp. (Dahlias)
Dalea candida (white prairie clover)
Dalea formosa (feather dalea)
Dalea purpurea (purple prairie clover)
Dalea spp. (prairie clovers)
Dampiera purpurea (Purple Dampiera)
Dampiera spp.
Dampiera stricta (Blue Dampiera)
Danthonia spicata (Poverty Oat Grass)
Danthonia spp.
Daphne burkwoodii (Burkwood Daphne)
Daphne caucasica (Caucasian Daphne)
Daphne cneorum (Rose Daphne)
Daphne laureola (spurge daphne)
Daphne mezereum (February daphne)
Daphne odora (Winter Daphne)
Daphne odora 'Aureomarginata' (variegated winter daphne)
Daphne spp.
Daphne tangutica (Tangut Daphne)
Daphne x transatlantica 'Summer Ice' (Summer Ice hybrid daphne)
Daphniphyllum macropodum (Himalayan Daphniphyllum)
Daphniphyllum spp.
Darlingtonia californica (California pitcher plant)
Darlingtonia spp.
Darmera peltata (umbrella plant)
Darmera spp.
Darwinia fascicularis (clustered darwinia)
Darwinia spp.
Dasiphora fruticosa (potentilla, cinquefoil)
Dasiphora spp. (shrubby cinquefoils)
Dasylirion spp. (sotols)
Dasylirion texanum (Texas sotol)
Dasylirion wheeleri (Wheeler sotol)
Dasyochloa pulchella (Fluffgrass)
Dasyochloa spp.
Datura metel (Devil's Trumpet Plant)
Datura spp. (Devil's Trumpets)
Datura stramonium (jimsonweed)
Datura wrightii (Sacred Datura)
Daucus carota (Queen Ann's lace)
Daucus carota 'Danvers' (Danvers Carrot)
Daucus carota 'Nantes' (Nantes Carrot)
Daucus carota 'Rainbow' (Rainbow Carrot Mix)
Daucus carota subsp. sativus 'Chantenay' (Chantenay Carrot)
Daucus carota subsp. sativus 'Danvers 126' (Danvers 126 Carrot)
Daucus carota subsp. sativus 'Imperator' (Imperator Carrot)
Daucus carota subsp. sativus 'Nantes' (Nantes Carrot)
Daucus carota subsp. sativus 'Rainbow' (Rainbow Carrots)
Daucus glochidiatus (Australian Carrot)
Daucus pusillus (American wild carrot)
Daucus spp. (carrots)
Davallia spp. (rabbit's foot ferns)
Davidia involucrata (dove tree)
Davidia spp.
Daviesia brevifolia (Leafless Bitter-pea)
Daviesia latifolia (hop bitter-pea)
Daviesia leptophylla (narrow-leaf bitter-pea)
Daviesia spp.
Daviesia ulicifolia (gorse bitter pea)
Daviesia villifera (prickly daviesia)
Dawsonia spp.
Dawsonia superba (giant moss)
Decodon spp.
Decodon verticillatus (swamp loosestrife)
Deinandra fasciculata (Clustered Tarweed)
Deinandra spp.
Delairea odorata (Cape-ivy)
Delairea spp.
Delonix regia (Royal Poinciana)
Delonix spp.
Delosperma congestum 'Gold Nugget' (Gold Nugget Ice Plant)
Delosperma × 'Fire Spinner' (Fire Spinner Ice Plant)
Delosperma spp. (Sheepfigs)
Delosperma sutherlandii (Sutherland's Ice Plant)
Delphinium (larkspurs)
Delphinium ajacis (doubtful knight's-spur)
Delphinium carolinianum (Wild Blue Larkspur)
Delphinium Hybrids (delphinium)
Delphinium menziesii (Menzies' Larkspur)
Delphinium nudicaule (Red larkspur)
Delphinium nuttallianum (Upland Larkspur)
Delphinium patens (Zigzag Larkspur)
Delphinium spp. (delphinium)
Delphinium tricorne (dwarf larkspur)
Delphinium trolliifolium (Streambank Larkspur)
Dendroalsia abietina (dendroalsia moss)
Dendroalsia spp.
Dendrobium kingianum (pink rock orchid)
Dendrobium linguiforme (tongue orchid)
Dendrobium speciosum (rock orchid)
Dendrobium spp.
Dendrocnide excelsa (Giant Stinging Tree)
Dendrocnide spp.
Dendrolycopodium dendroideum (prickly tree-clubmoss)
Dendrolycopodium obscurum (flat-branched tree-clubmoss)
Dendrolycopodium spp. (tree-clubmosses)
Dendromecon rigida (Bush Poppy)
Dendromecon spp.
Dennstaedtia punctilobula (Hay-Scented Fern)
Dennstaedtia spp.
Deparia acrostichoides (silvery glade fern)
Deparia spp.
Dermatophyllum secundiflorum (Texas mountain laurel)
Dermatophyllum spp.
Deschampsia cespitosa (tufted hairgrass)
Deschampsia flexuosa (Wavy Hair Grass)
Deschampsia spp.
Descurainia (Tansymustards)
Descurainia pinnata (Western Tansymustard)
Descurainia sophia (flixweed)
Descurainia spp. (tansy mustard)
Desmanthus illinoensis (Illinois bundleflower)
Desmanthus spp. (bundleflowers)
Desmodium canadense (showy tick-trefoil)
Desmodium incanum (creeping beggarweed)
Desmodium paniculatum (panicled ticktrefoil)
Desmodium rhytidophyllum (Rusty tick-trefoil)
Desmodium spp. (ticktrefoils)
Deutzia gracilis (slender deutzia)
Deutzia spp.
Dianella brevicaulis (Coast Flax-Lily)
Dianella longifolia (Pale Flax-Lily)
Dianella revoluta (Blueberry Lily)
Dianella spp. (flax-lilies)
Dianella tasmanica
Dianthus arenarius (sand pink)
Dianthus armeria (Deptford pink)
Dianthus barbatus (sweet William)
Dianthus carthusianorum (Carthusian Pink)
Dianthus × 'Coconut Surprise' (Coconut Surprise Dianthus)
Dianthus cruentus
Dianthus deltoides
Dianthus gratianopolitanus (pinks)
Dianthus spp. (carnations)
Dianthus × 'Sugar Plum' (Sugar Plum Dianthus)
Diaperia prolifera (flathead rabbit tobacco)
Diaperia spp.
Diascia spp.
Dicentra canadensis (squirrel corn)
Dicentra cucullaria (Dutchman's breeches)
Dicentra formosa (Pacific bleeding heart)
Dicentra formosa 'Bacchanal' (Bacchanal Bleeding Heart)
Dicentra 'King of Hearts' (King of Hearts Bleeding Heart)
Dicentra 'Luxuriant' (Luxuriant Bleeding Heart)
Dicentra spectabilis (Bleeding Heart)
Dicentra spp. (Bleedinghearts)
Dichanthelium clandestinum (deertongue)
Dichanthelium oligosanthes (Heller's Rosette Grass)
Dichanthelium spp. (rosette grasses)
Dichelostemma congestum (Ookow)
Dichelostemma spp.
Dichondra carolinensis (Carolina ponysfoot)
Dichondra repens (kidney weed)
Dichondra spp. (ponysfoots)
Dichorisandra spp.
Dichorisandra thyrsiflora (Blue Ginger)
Dicksonia antarctica (man fern)
Dicksonia spp.
Dicranella heteromalla (Silky Forklet-moss)
Dicranella spp.
Dicranoweisia cirrata (Common Pincushion)
Dicranoweisia spp.
Dicranum scoparium (Broom Forkmoss)
Dicranum spp. (Forkmosses)
Didiscus spp.
Didymodon spp.
Dieffenbachia seguine (Dumb Cane)
Dieffenbachia spp. (mother-in-law's-tongues)
Dierama pulcherrimum (Angel's Fishing Rod)
Dierama spp.
Diervilla lonicera (northern bush honeysuckle)
Diervilla rivularis (Bush Honeysuckle)
Diervilla × splendens (Bush Honeysuckle)
Diervilla spp.
Dieteria canescens (Hoary Tansyaster)
Dieteria spp. (tansyasters)
Dietes bicolor (Yellow Fortnight Lily)
Dietes grandiflora (Large Fortnight Lily)
Dietes spp. (Fortnight Lilies)
Digitalis ferruginea (Rusty Foxglove)
Digitalis grandiflora (Large Yellow Foxglove)
Digitalis isabelliana
Digitalis laevigata (Grecian Foxglove)
Digitalis lutea (yellow foxglove)
Digitalis obscura (Sunset Foxglove)
Digitalis parviflora (Small-flowered Foxglove)
Digitalis purpurea (common foxglove)
Digitalis purpurea 'Excelsior' (Excelsior Foxglove)
Digitalis thapsi (Spanish Foxglove)
Digitaria sanguinalis (Hairy Crabgrass)
Digitaria spp. (crabgrasses, cottontops, and allies)
Dillwynia cinerascens (grey parrot pea)
Dillwynia floribunda (Parrot Pea)
Dillwynia glaberrima (Smooth Parrot-pea)
Dillwynia hispida (red parrot-pea)
Dillwynia phylicoides (small-leaf parrot-pea)
Dillwynia retorta (heathy parrot pea)
Dillwynia sericea (showy parrot-pea)
Dillwynia spp. (egg and bacon peas)
Dimorphotheca spp. (Afro-Australian daisies)
Diodia spp.
Diodia virginiana (buttonweed)
Dioscorea bulbifera (air potato)
Dioscorea communis (Black Bryony)
Dioscorea polystachya (Chinese yam)
Dioscorea spp. (Cinnamon vines)
Dioscorea transversa (Common Yam Vine)
Dioscorea villosa (wild yam)
Diospyros geminata (scaly ebony)
Diospyros kaki (Japanese Persimmon)
Diospyros lotus (Date Plum)
Diospyros spp. (persimmons)
Diospyros texana (Texas Persimmon)
Diospyros virginiana (American Persimmon)
Diphasiastrum digitatum (fan clubmoss)
Diphasiastrum spp. (Ground cedars)
Diphylleia cymosa (Umbrella Leaf)
Diphylleia spp.
Diplacus aurantiacus (orange bush monkeyflower)
Diplacus × australis (San Diego Monkeyflower)
Diplacus longiflorus (southern bush monkeyflower)
Diplacus puniceus (red bush monkeyflower)
Diplacus spp.
Diplarrena moraea (Australian white iris)
Diplarrena spp.
Diploglottis australis (Native Tamarind)
Diploglottis spp.
Diplophyllum albicans (White Earwort)
Diplophyllum spp.
Diplotaxis muralis (annual wall-rocket)
Diplotaxis spp. (Wall-Rockets)
Diplotaxis tenuifolia (Perennial Wall-rocket)
Dipodium punctatum (Blotched Hyacinth-Orchid)
Dipodium roseum (Rosy Hyacinth Orchid)
Dipodium spp.
Dipodium variegatum (Slender Hyacinth-Orchid)
Dipogon lignosus (Okie bean)
Dipogon spp.
Dipsacus fullonum (common teasel)
Dipsacus laciniatus (cutleaf teasel)
Dipsacus pilosus (small teasel)
Dipsacus sativus (fuller's teasel)
Dipsacus spp. (teasels)
Dipterostemon capitatus (blue dicks)
Dipterostemon spp.
Dirca palustris (eastern leatherwood)
Dirca spp.
Disa bracteata (Bract Disa)
Disanthus cercidifolius (Disanthus)
Disanthus spp.
Disa spp.
Disphyma crassifolium (Purple Dewplant)
Disphyma spp.
Disporopsis pernyi (Pernyi's Disporopsis)
Disporopsis spp.
Disporum spp.
Disporum uniflorum (Yellow Fairybells)
Distichlis distichophylla (Australian Salt-grass)
Distichlis spicata (Saltgrass)
Distichlis spp.
Distimake dissectus (Alamo vine)
Distimake spp.
Distylium spp.
Dittrichia graveolens (Stinkwort)
Dittrichia spp.
Diuris chryseopsis (Common Golden Moths)
Diuris orientis (Wallflower orchid)
Diuris pardina (Leopard Orchid)
Diuris spp. (Double Tails)
Diuris sulphurea (Tiger Orchid)
Dodonaea spp. (Hop-bushes)
Dodonaea triquetra (Common Hop Bush)
Dodonaea viscosa (Akeake)
Dodonaea viscosa 'Purpurea'
Doellingeria spp.
Doellingeria umbellata (flat-top white aster)
Dolichandra spp.
Dolichandra unguis-cati (Catclaw vine)
Doodia aspera (Prickly Rasp fern)
Doodia caudata (Small Rasp Fern)
Doodia spp.
Doronicum pardalianches (Leopard's-bane)
Doryanthes excelsa (Gymea Lily)
Doryanthes spp.
Draba aizoides (Yellow Whitlow Grass)
Draba spp. (Drabas)
Draba verna (Common Whitlowgrass)
Dracaena fragrans (Corn Plant)
Dracaena masoniana (Whale Fin Snake Plant)
Dracaena reflexa (Song of India)
Dracaena spp. (Dragon Trees)
Dracaena zeylanica (Ceylon Bowstring Hemp)
Dracocephalum grandiflorum (Large-flowered Dragonhead)
Dracocephalum spp.
Dracophyllum secundum (necklace heath)
Dracophyllum spp.
Dracunculus spp.
Dracunculus vulgaris (dragon arum)
Drosanthemum spp. (Dewfigs)
Drosera aberrans (Scented Sundew)
Drosera anglica (Great Sundew)
Drosera auriculata (Tall sundew)
Drosera binata (Fork-leaved Sundew)
Drosera burmanni (tropical sundew)
Drosera capillaris (Pink Sundew)
Drosera collina
Drosera glanduligera (Pimpernel sundew)
Drosera gunniana
Drosera hookeri (Grassland Sundew)
Drosera intermedia (spoonleaf sundew)
Drosera macrantha (Bridal Rainbow)
Drosera pallida (Pale Rainbow)
Drosera planchonii (Climbing Sundew)
Drosera pygmaea (pygmy sundew)
Drosera rotundifolia (round-leaved sundew)
Drosera spatulata (Rosy Sundew)
Drosera spp. (Sundews)
Drosera whittakeri (Whittaker's sundew)
Drymocallis arguta (Tall Cinquefoil)
Drymocallis glandulosa (Sticky Cinquefoil)
Drymocallis spp.
Drynaria rigidula (basket fern)
Drynaria spp.
Dryopteris (wood ferns)
Dryopteris affinis (Golden-scaled Male-fern)
Dryopteris arguta (coastal woodfern)
Dryopteris atrata
Dryopteris carthusiana (spinulose wood fern)
Dryopteris crassirhizoma (Thick-stemmed Wood Fern)
Dryopteris cycadina (Shaggy Wood Fern)
Dryopteris dilatata (broad buckler-fern)
Dryopteris erythrosora (autumn fern)
Dryopteris expansa (coast shield fern)
Dryopteris filix-mas (Male Fern)
Dryopteris intermedia (intermediate wood fern)
Dryopteris lepidopoda (Sunset Fern)
Dryopteris marginalis (marginal wood fern)
Dryopteris sieboldii
Dryopteris spp. (Mixed Hardy Ferns)
Dryopteris wallichiana (Wallich's Wood Fern)
Drypetes deplanchei (Yellow Tulipwood)
Drypetes spp.
Duboisia myoporoides (corkwood)
Duboisia spp.
Dudleya cymosa (Canyon liveforever)
Dudleya edulis (Fingertips)
Dudleya farinosa (Bluff Lettuce)
Dudleya lanceolata (lanceleaf liveforever)
Dudleya pulverulenta (Chalk Dudleya)
Dudleya spp. (Liveforever)
Dulichium arundinaceum (Three-way Sedge)
Dulichium spp.
Duma florulenta (Tangled Lignum)
Duma spp.
Duranta erecta (Golden Dewdrop)
Duranta spp.
Dymondia spp.
Dypsis lutescens (Areca Palm)
Dypsis spp.
Dyschoriste nagchana
Dyschoriste spp.
Dysphania ambrosioides (Mexican tea)
Dysphania spp.
Eccremocarpus spp.
Echeveria elegans (Mexican Gem)
Echeveria spp. (echeveria)
Echinacea angustifolia (Narrow-leaved Coneflower)
Echinacea × 'Cheyenne Spirit' (Cheyenne Spirit Coneflower)
Echinacea Hybrids (coneflower)
Echinacea 'Kim's Knee High' (Kim's Knee High Coneflower)
Echinacea pallida (Pale Purple Coneflower)
Echinacea paradoxa (Yellow Coneflower)
Echinacea purpurea (Purple Coneflower)
Echinacea purpurea 'Bravado' (Bravado Purple Coneflower)
Echinacea purpurea 'Magnus' (Magnus Purple Coneflower)
Echinacea purpurea 'PowWow White' (PowWow White Coneflower)
Echinacea purpurea 'PowWow Wild Berry' (PowWow Wild Berry Coneflower)
Echinacea purpurea 'Ruby Star' (Ruby Star Coneflower)
Echinacea purpurea 'Sombrero Salsa Red' (Sombrero Salsa Red Coneflower)
Echinacea purpurea 'White Swan' (White Swan Coneflower)
Echinacea simulata (Wavy-Leaved Purple Coneflower)
Echinacea spp. (coneflowers)
Echinochloa crus-galli (barnyardgrass)
Echinochloa spp. (Barnyard Grasses)
Echinocystis lobata (prickly cucumber)
Echinocystis spp.
Echinops bannaticus (Blue Globe Thistle)
Echinops exaltatus (Russian Globe Thistle)
Echinopsis spp. (South American hedgehog cactuses)
Echinops sphaerocephalus (Great Globe Thistle)
Echinops spp. (Globe thistles)
Echium candicans (Pride of Madeira)
Echium pininana (Giant Viper's-bugloss)
Echium plantagineum (purple viper's-bugloss)
Echium spp. (Viper's-buglosses)
Echium vulgare (blueweed)
Echium webbii
Eclipta prostrata (False Daisy)
Eclipta spp.
Edgeworthia chrysantha (edgeworthia, paperbush)
Edgeworthia spp.
Edraianthus graminifolius (Grassy Bells)
Edraianthus spp.
Egeria densa (Brazilian egeria)
Egeria spp.
Ehretia anacua (Anacua)
Ehretia spp.
Ehrharta erecta (panic veldtgrass)
Ehrharta longiflora (longflower veldtgrass)
Ehrharta spp.
Elaeagnus angustifolia (Russian olive)
Elaeagnus pungens (silverberry)
Elaeagnus pungens 'Maculata' (Golden Variegated Elaeagnus)
Elaeagnus spp. (oleasters)
Elaeagnus umbellata (autumn olive)
Elaeocarpus grandis (blue quandong)
Elaeocarpus obovatus (Hard Quandong)
Elaeocarpus reticulatus (Blueberry ash)
Elaeocarpus spp.
Elaeodendron australe (Red-fruited Olive Plum)
Elaeodendron spp.
Elaphoglossum spp. (tongueferns)
Elegia spp. (Goldreeds)
Eleocharis ovata (Ovoid Spikerush)
Eleocharis palustris (Common Spikerush)
Eleocharis spp. (spikerushes)
Elephantopus carolinianus (leafy elephant's-foot)
Elephantopus spp. (Elephant's Feet)
Elephantopus tomentosus (common elephant's-foot)
Eleusine indica (Goose Grass)
Eleusine spp.
Eleutherococcus spp.
Elleanthus spp.
Elliottia pyroliflora (copperbush)
Elliottia spp.
Elsholtzia spp.
Elsholtzia stauntonii
Elymus athericus (sea couch)
Elymus canadensis (Canada wild rye)
Elymus elymoides (Squirreltail)
Elymus glaucus (blue wildrye)
Elymus hystrix (Bottlebrush Grass)
Elymus magellanicus (Magellan Wheatgrass)
Elymus repens (quackgrass)
Elymus spp. (wild ryes and wheatgrasses)
Elymus virginicus (Virginia wildrye)
Elythranthera brunonis (purple enamel orchid)
Elythranthera spp.
Embelia australiana (Embelia)
Embelia spp.
Embothrium coccineum (Chilean fire tree)
Embothrium spp.
Emilia fosbergii (Red Tasselflower)
Emilia sonchifolia (lilac tasselflower)
Emilia spp. (Tasselflowers)
Emmenanthe penduliflora (whispering bells)
Emmenanthe spp.
Empetrum nigrum (black crowberry)
Empetrum spp.
Encelia californica (California brittlebush)
Encelia farinosa (Brittlebush)
Encelia spp. (brittlebushes)
Enchylaena spp.
Enchylaena tomentosa (Barrier Saltbush)
Enemion biternatum (false rue anemone)
Enemion spp.
Engelmannia peristenia (Engelmann daisy)
Engelmannia spp.
Enkianthus campanulatus (enkianthus)
Enkianthus perulatus (White Enkianthus)
Enkianthus serrulatus (white bell enkianthus)
Enkianthus spp.
Ensete spp.
Ensete ventricosum (Ethiopian Banana)
Entodon seductrix (seductive entodon moss)
Entodon spp. (Entodon mosses)
Entolasia spp.
Entolasia stricta (Wiry Panic)
Epacris impressa (Common Heath)
Epacris longiflora (Fuchsia Heath)
Epacris microphylla (Coral Heath)
Epacris obtusifolia (blunt-leaf heath)
Epacris pulchella (New South Wales Coral Heath)
Epacris spp.
Ephedra spp. (Jointfirs)
Ephedra viridis (Green Ephedra)
Epidendrum ibaguense (Reed Orchid)
Epidendrum spp.
Epifagus spp.
Epifagus virginiana (Beechdrops)
Epigaea repens (trailing arbutus)
Epigaea spp.
Epilobium brachycarpum (panicled willowherb)
Epilobium brunnescens (New Zealand Willowherb)
Epilobium canum (California fuchsia)
Epilobium ciliatum (common willowherb (native))
Epilobium coloratum (cinnamon willowherb)
Epilobium hirsutum (Great Willowherb)
Epilobium montanum (Broad-leaved Willowherb)
Epilobium parviflorum (Hoary Willowherb)
Epilobium spp. (willowherbs)
Epilobium tetragonum (Square-stemmed Willowherb)
Epimedium acuminatum (Pointed-leaved Barrenwort)
Epimedium 'Amber Queen'
Epimedium davidii (David's Barrenwort)
Epimedium grandiflorum 'Lilafee'
Epimedium grandiflorum 'White Queen'
Epimedium pinnatum ssp. colchicum (epimedium-pinnatum-ssp-colchicum)
Epimedium pubigerum
Epimedium spp. (barrenworts)
Epimedium ssp. (barrenwort)
Epimedium x perralchicum 'Frohnleiten' (Frohnleiten Epimedium)
Epimedium x rubrum
Epipactis gigantea (Stream Orchid)
Epipactis helleborine (Broad-leaved helleborine)
Epipactis palustris (Marsh Helleborine)
Epipactis spp. (Helleborines)
Epiphyllum chrysocardium (Fern Leaf Cactus)
Epiphyllum spp.
Epipremnum aureum (Golden Pothos)
Epipremnum aureum 'Marble Queen' (Marble Queen Pothos)
Epipremnum aureum 'N'Joy' (N'Joy Pothos)
Epipremnum pinnatum (Dragon Tail Plant)
Epipremnum spp.
Episcia cupreata (Episcia Flame Violet)
Episcia spp.
Equisetum arvense (common horsetail (native))
Equisetum × ferrissii (Ferriss' horsetail)
Equisetum fluviatile (water horsetail)
Equisetum hyemale (scouring rush)
Equisetum laevigatum (smooth horsetail)
Equisetum palustre (marsh horsetail)
Equisetum spp. (horsetails)
Equisetum sylvaticum (wood horsetail)
Equisetum telmateia (great horsetail)
Eragrostis curvula (African love grass)
Eragrostis spectabilis (Purple Lovegrass)
Eragrostis spp. (Lovegrasses)
Eranthis hyemalis (Winter Aconite)
Eranthis spp.
Erechtites hieraciifolius (American burnweed)
Erechtites spp.
Eremalche rotundifolia (desert fivespot)
Eremalche spp.
Eremochloa ophiuroides (Centipede Grass)
Eremochloa ophiuroides (Centipede Grass)
Eremochloa spp.
Eremophila debilis (Winter Apple)
Eremophila glabra (Common Emu-Bush)
Eremophila longifolia (Weeping Emubush)
Eremophila nivea
Eremophila spp.
Eremothera boothii (Booth's Evening Primrose)
Eremothera spp.
Erica (Heaths)
Erica carnea (Heath)
Erica lusitanica (Portuguese Heath)
Ericameria ericoides (California Goldenbush)
Ericameria linearifolia (narrowleaf goldenbush)
Ericameria nauseosa (Rubber Rabbitbrush)
Ericameria spp. (goldenbushes)
Erica spp. (heath)
Erica tetralix (Cross-leaved Heath)
Erigenia bulbosa (harbinger of spring)
Erigenia spp.
Erigeron acris (bitter fleabane)
Erigeron annuus (annual fleabane)
Erigeron bonariensis (Flax-leaved Horseweed)
Erigeron canadensis (horseweed)
Erigeron compositus (cut-leaf fleabane)
Erigeron divergens (spreading fleabane)
Erigeron floribundus (Tall Fleabane)
Erigeron foliosus (Leafy Fleabane)
Erigeron glacialis (Subalpine Fleabane)
Erigeron glaucus (Seaside Fleabane)
Erigeron karvinskianus (Mexican Fleabane)
Erigeron karvinskianus spp. (Mexican fleabane)
Erigeron modestus (Plains fleabane)
Erigeron peregrinus (Wandering Fleabane)
Erigeron philadelphicus (Philadelphia Fleabane)
Erigeron pulchellus (robin's-plantain)
Erigeron quercifolius (oakleaf fleabane)
Erigeron speciosus (Showy Fleabane)
Erigeron spp. (fleabanes and horseweeds)
Erigeron strigosus (daisy fleabane)
Erigeron sumatrensis (tropical horseweed)
Erinus alpinus (Fairy Foxglove)
Erinus spp.
Eriobotrya japonica (Loquat)
Eriobotrya spp. (Loquats)
Eriocapitella hupehensis (Hubei Anemone)
Eriocapitella × hybrida (Japanese Anemone)
Eriocapitella spp. (Fall-blooming anemones)
Eriocephalus spp. (Kapokbushes)
Eriochilus cucullatus (Parson's Bands)
Eriochilus spp.
Eriocoma hymenoides (Sand Ricegrass)
Eriocoma spp.
Eriodictyon californicum (California yerba santa)
Eriodictyon crassifolium (Thick-leaved Yerba Santa)
Eriodictyon spp. (yerba santa)
Eriogonum compositum (Arrowleaf Buckwheat)
Eriogonum fasciculatum (California Buckwheat)
Eriogonum heracleoides (Parsnip-flowered Buckwheat)
Eriogonum inflatum (Desert Trumpet)
Eriogonum latifolium (Seaside Buckwheat)
Eriogonum nudum (Naked Buckwheat)
Eriogonum ovalifolium (cushion buckwheat)
Eriogonum parvifolium (Seacliff Wild Buckwheat)
Eriogonum spp. (wild buckwheats)
Eriogonum strictum (Strict Buckwheat)
Eriogonum umbellatum (Sulfur Buckwheat)
Eriogonum wrightii (Wright's buckwheat)
Eriophorum angustifolium (Common Cottongrass)
Eriophorum chamissonis
Eriophorum spp. (Cottongrasses)
Eriophorum vaginatum (tussock cottongrass)
Eriophorum virginicum (tawny cottongrass)
Eriophyllum confertiflorum (Golden Yarrow)
Eriophyllum lanatum (Oregon Sunshine)
Eriophyllum spp. (Woolly sunflowers)
Eriophyllum staechadifolium (seaside woolly sunflower)
Eriophyllum wallacei (Wallace's woollydaisy)
Eriospermum spp. (Woolseeds)
Eriostemon australasius (pink wax flower)
Eriostemon spp.
Erodium botrys (Mediterranean Stork's-bill)
Erodium chrysanthum (Yellow Stork's Bill)
Erodium cicutarium (Redstem Stork's-bill)
Erodium moschatum (musk stork's-bill)
Erodium spp. (stork's-bills)
Erodium texanum (Texas stork's bill)
Eruca sativa (Arugula)
Eruca spp.
Eryngium agavifolium (Agave-leaved Sea Holly)
Eryngium alpinum (Alpine Sea Holly)
Eryngium amethystinum (Amethyst Sea Holly)
Eryngium giganteum (Miss Wilmott's ghost)
Eryngium Hybrids (sea holly)
Eryngium leavenworthii (Leavenworth's eryngo)
Eryngium maritimum (Sea Holly)
Eryngium ovinum (blue devil)
Eryngium planum (Blue Eryngo)
Eryngium spp. (Eryngos)
Eryngium yuccifolium (Rattlesnake Master)
Erysimum (wallflower)
Erysimum capitatum (Western Wallflower)
Erysimum × cheiri (Wallflower)
Erythranthe cardinalis (Scarlet Monkeyflower)
Erythranthe guttata (yellow monkey-flower)
Erythranthe lewisii (Great Purple Monkeyflower)
Erythranthe spp. (monkeyflowers)
Erythrina crista-galli (Cockspur coral tree)
Erythrina herbacea (Eastern Coral Bean)
Erythrina spp. (Coral trees)
Erythronium albidum (white fawnlily)
Erythronium americanum (Yellow Trout Lily)
Erythronium grandiflorum (Glacier Lily)
Erythronium hendersonii (Fawn Lily)
Erythronium oregonum (Oregon fawn lily)
Erythronium 'Pagoda' (Pagoda fawn lily)
Erythronium revolutum (coast fawn lily)
Erythronium spp. (fawn lilies)
Erythronium umbilicatum (dimpled trout lily)
Escallonia 'Newport Dwarf' (Newport Dwarf Escallonia)
Escallonia × rigida (Escallonia Hybrid)
Escallonia rubra (redclaws)
Escallonia spp. (escallonia)
Eschscholzia californica (California poppy)
Eschscholzia minutiflora (Little Gold Poppy)
Eschscholzia spp.
Escobaria spp.
Escobaria vivipara (Spinystar)
Eubotrys racemosus (fetterbush)
Eubotrys spp.
Eucalyptus (eucalyptus)
Eucalyptus arenacea (desert stringybark)
Eucalyptus camaldulensis (River Red Gum)
Eucalyptus coccifera (Tasmanian Snow Gum)
Eucalyptus crebra (Narrow-leaved Red Ironbark)
Eucalyptus cypellocarpa (mountain grey gum)
Eucalyptus deglupta (Rainbow Eucalyptus Tree)
Eucalyptus diversifolia (Coastal Mallee)
Eucalyptus fasciculosa (Pink Gum)
Eucalyptus globulus (Tasmanian Blue Gum)
Eucalyptus grandis (Flooded Gum)
Eucalyptus gunnii (Silver Drop Eucalyptus)
Eucalyptus incrassata (Ridge-fruited mallee)
Eucalyptus leucoxylon (Yellow gum)
Eucalyptus melliodora (Yellow Box)
Eucalyptus microcorys (Tallowwood)
Eucalyptus neglecta (Omeo Gum)
Eucalyptus obliqua (Messmate Stringybark)
Eucalyptus ovata (Swamp Gum)
Eucalyptus pauciflora ssp. debeuzevillei (Jounama Snow Gum)
Eucalyptus pauciflora ssp. niphophila (Alpine Snow Gum)
Eucalyptus pilularis (Blackbutt)
Eucalyptus polyanthemos (Silver Dollar Gum)
Eucalyptus racemosa (Northern Scribbly Gum)
Eucalyptus regnans (Australian Mountain Ash)
Eucalyptus robusta (Swamp Mahogany)
Eucalyptus sideroxylon (Red Ironbark)
Eucalyptus spp. (eucalyptus)
Eucalyptus tereticornis (Forest red gum)
Eucalyptus viminalis (manna gum)
Eucomis spp.
Eucryphia cordifolia (eucryphia)
Eucryphia glutinosa (Brush Bush)
Eucryphia spp.
Eucrypta chrysanthemifolia (common eucrypta)
Eucrypta spp.
Eugenia spp.
Eulobus californicus (California primrose)
Eulobus spp.
Eulophia picta (Shepherd's Crook Orchid)
Eulophia spp.
Euonymus alatus (Burning Bush)
Euonymus alatus 'Compactus' (dwarf winged euonymus)
Euonymus americanus (strawberry bush)
Euonymus atropurpureus (wahoo)
Euonymus europaeus (Spindle)
Euonymus fortunei (wintercreeper)
Euonymus fortunei 'Emerald Gaiety' (Emerald Gaiety Euonymus)
Euonymus fortunei 'Kewensis'
Euonymus japonicus (Japanese Euonymus)
Euonymus spp. (spindles)
Eupatorium altissimum (tall boneset)
Eupatorium cannabinum (hemp agrimony)
Eupatorium capillifolium (dogfennel)
Eupatorium maculatum 'Gateway' (Gateway Joe Pye Weed)
Eupatorium perfoliatum (Boneset)
Eupatorium serotinum (late boneset)
Eupatorium spp. (bonesets)
Euphorbia albomarginata (Whitemargin Sandmat)
Euphorbia amygdaloides (wood spurge)
Euphorbia amygdaloides var. robbiae
Euphorbia bicolor (snow-on-the-prairie)
Euphorbia ceratocarpa
Euphorbia characias ssp. 'Tasmanian Tiger' (Tasmanian Tiger Spurge)
Euphorbia characias wulfenii (Mediterranean spurge)
Euphorbia cornigera (Horned Spurge)
Euphorbia corollata (flowering spurge)
Euphorbia cyathophora (wild poinsettia)
Euphorbia cyparissias (cypress spurge)
Euphorbia dentata (green poinsettia)
Euphorbia dulcis 'Chameleon' (Chameleon Spurge)
Euphorbia griffithii (orange spurge)
Euphorbia helioscopia (Sun spurge)
Euphorbia hirta (Asthma Plant)
Euphorbia hypericifolia (Diamond Frost Euphorbia)
Euphorbia lactea (Dragon Bones)
Euphorbia lathyris (caper spurge)
Euphorbia maculata (Spotted spurge)
Euphorbia marginata (snow-on-the-mountain)
Euphorbia mellifera (Honey Spurge)
Euphorbia milii (Crown-of-Thorns)
Euphorbia myrsinites (Myrtle Spurge)
Euphorbia nicaeensis
Euphorbia nutans (nodding spurge)
Euphorbia oblongata (eggleaf spurge)
Euphorbia palustris
Euphorbia paralias (Sea Spurge)
Euphorbia peplus (petty spurge)
Euphorbia polycarpa (smallseed sandmat)
Euphorbia polychroma
Euphorbia portlandica (Portland Spurge)
Euphorbia prostrata (prostrate sandmat)
Euphorbia pulcherrima (Poinsettia)
Euphorbia seguieriana
Euphorbia serpens (creeping spurge)
Euphorbia spp. (Spurges)
Euphorbia tirucalli (Fire Stick)
Euphorbia virgata (leafy spurge)
Euphorbia x pasteurii
Euphrasia collina (purple eyebright)
Euphrasia nemorosa (Common Eyebright)
Euphrasia spp. (eyebrights)
Eupomatia laurina (Bolwarra)
Eupomatia spp.
Eurhynchium spp.
Eurhynchium striatum (Common Striated Feather-moss)
Euroschinus falcatus (Blush Cudgerie)
Euroschinus spp.
Eurya spp.
Eurybia divaricata (white wood aster)
Eurybia divaricata (White Wood Aster)
Eurybia macrophylla (large-leaved aster)
Eurybia spp. (wood asters)
Euryomyrtus ramosissima (Rosy Heath-myrtle)
Euryomyrtus spp.
Euryops spp. (True-eye Daisies)
Eustrephus latifolius (Wombat Berry)
Eustrephus spp.
Eutaxia microphylla (common eutaxia)
Eutaxia spp.
Euthamia caroliniana (slender goldentop)
Euthamia graminifolia (flat-topped goldenrod)
Euthamia spp. (grass-leaved goldenrods)
Eutrochium dubium (coastal plain Joe-Pye weed)
Eutrochium fistulosum (tall Joe-pye weed)
Eutrochium maculatum (Spotted Joe Pye Weed)
Eutrochium purpureum (sweet Joe-Pye-weed)
Eutrochium spp. (Joe-Pye weeds)
Evolvulus alsinoides (tropical speedwell)
Evolvulus sericeus (silky evolvulus)
Evolvulus spp.
Excoecaria agallocha (milky mangrove)
Excoecaria spp.
Exocarpos cupressiformis (Cherry Ballart)
Exocarpos latifolius (Broad Leaved Native Cherry)
Exocarpos spp.
Exocarpos strictus (Pale-fruit Ballart)
Eysenhardtia spp.
Eysenhardtia texana (Texas Kidneywood)
Fabiana imbricata (Pichi)
Fabiana spp.
Fagopyrum esculentum (Common Buckwheat)
Fagopyrum spp.
Fagus grandifolia (American Beech)
Fagus spp. (beeches)
Fagus sylvatica (European beech)
Fagus sylvatica 'Pendula' (weeping beech)
Fagus sylvatica 'Purpurea Tricolor' (Tricolor Beech)
Fagus sylvatica 'Rohanii' (Rohan Purple Beech)
Fagus sylvatica var. atropurpurea (purple beech)
Fagus sylvatica var. atropurpurea 'Pendula' (weeping copper beech)
Fallopia baldschuanica (Bukhara Fleeceflower)
Fallopia × bohemica (Bohemian giant knotweed)
Fallopia convolvulus (Black-bindweed)
Fallopia japonica (Japanese knotweed)
Fallopia sachalinensis (giant knotweed)
Fallopia scandens (climbing false buckwheat)
Fallopia spp. (Fallopias)
Fallugia paradoxa (Apache plume)
Fallugia spp.
Farfugium japonicum
Farfugium japonicum var. giganteum
Farfugium spp.
Fargesia murielae (Umbrella Bamboo)
Fargesia nitida (Fountain Bamboo)
Fargesia robusta (Robust Bamboo)
Fargesia spp.
Fatoua spp.
Fatoua villosa (hairy crabweed)
× Fatshedera lizei (fatshedera)
Fatsia japonica (fatsia)
Fatsia spp.
Felicia spp. (Felicias)
Ferocactus cylindraceus (California Barrel Cactus)
Ferocactus spp. (barrel cactuses)
Ferocactus wislizeni (fishhook barrel cactus)
Ferula communis (giant fennel)
Ferula spp.
Festuca (Fescues)
Festuca amethystina
Festuca arundinacea (Tall Fescue)
Festuca brevipila (Hard Fescue)
Festuca glauca (blue fescue)
Festuca idahoensis (Idaho fescue)
Festuca roemeri (Roemer's Fescue)
Festuca rubra (Red Fescue)
Ficaria spp.
Ficaria verna (lesser celandine)
Ficinia nodosa (Knobby Clubrush)
Ficinia spp. (Star Grasses)
Ficus altissima (Council Tree)
Ficus aurea (Florida Strangler Fig)
Ficus benghalensis (Ficus Audrey)
Ficus benjamina (Ficus Benjamina)
Ficus carica (common fig)
Ficus coronata (creek sandpaper fig)
Ficus elastica (Rubber Plant)
Ficus elastica 'Burgundy' (Burgundy Rubber Tree)
Ficus lyrata (fiddle leaf fig)
Ficus maclellandii (Ficus Alii)
Ficus macrophylla (Moreton Bay fig)
Ficus microcarpa (Ficus Ginseng)
Ficus opposita (Sandpaper Fig)
Ficus rubiginosa (Port Jackson fig)
Ficus spp. (Figs)
Ficus triangularis (Variegated Ficus Triangularis)
Ficus virens (White fig)
Filago germanica (Common Cudweed)
Filago spp.
Filipendula spp.
Filipendula ulmaria (Meadowsweet)
Filipendula vulgaris (Dropwort)
Fimbristylis dichotoma (Common Fringe-rush)
Fimbristylis spp. (Fringe Rush)
Fissidens spp. (pocket mosses)
Fissidens taxifolius (Common Pocket-moss)
Flagellaria indica (Indian Bushcane)
Flagellaria spp.
Flindersia australis (Crows Ash)
Flindersia spp.
Foeniculum spp.
Foeniculum vulgare (Fennel)
Forestiera pubescens (Downy Forestiera)
Forestiera spp.
Forsythia × intermedia 'Lynwood Gold' (Lynwood Gold Forsythia)
Forsythia spp. (Forsythias)
Forsythia suspensa (Golden-bell)
Forsythia x intermedia (hybrid forsythia)
Fossombronia spp. (Frillworts)
Fothergilla gardenii (dwarf fothergilla)
Fothergilla spp. (witch-alders)
Fouquieria splendens (ocotillo)
Fouquieria spp.
Fragaria chiloensis (Beach Strawberry)
Fragaria 'Lipstick' (lipstick strawberry)
Fragaria spp. (strawberries)
Fragaria vesca (Woodland Strawberry)
Fragaria virginiana (Mountain Strawberry)
Francoa sonchifolia (Chilean bridalwreath)
Francoa spp.
Frangula alnus (alder buckthorn)
Frangula californica (coffeeberry)
Frangula caroliniana (Carolina buckthorn)
Frangula purshiana (cascara)
Frangula spp. (False-Buckthorns)
Frankenia salina (Alkali Heath)
Frankenia spp.
Franklinia alatamaha (franklinia)
Franklinia spp.
Frasera speciosa (monument plant)
Frasera spp.
Fraxinus albicans (Texas ash)
Fraxinus americana (White Ash)
Fraxinus angustifolia (Narrow-leaved Ash)
Fraxinus excelsior f. diversiflora (One-leaved Ash)
Fraxinus latifolia (Oregon ash)
Fraxinus nigra (black ash)
Fraxinus ornus (flowering ash, manna ash)
Fraxinus oxycarpa 'Raywood' (Raywood ash, Flame ash)
Fraxinus spp. (ashes)
Fraxinus velutina (Velvet Ash)
Freesia × kewensis
Freesia leichtlinii (Dune Kammetjie)
Freesia spp.
Fremontodendron californicum (California flannelbush)
Fremontodendron spp.
Fritillaria affinis (Chocolate Lily)
Fritillaria imperialis (crown imperial)
Fritillaria meleagris (snakes-head fritillary)
Fritillaria pudica (yellow fritillary)
Fritillaria spp. (Fritillaries)
Frullania dilatata (Dilated Scalewort)
Frullania eboracensis (New York Scalewort)
Frullania spp. (Scaleworts)
Frullania tamarisci (Tamarisk Scalewort)
Fuchsia × hybrida (hybrid fuchsia)
Fuchsia magellanica (hardy fuchsia)
Fuchsia spp. (fuchsias)
Fuchsia x hybrida (Fuchsia)
Fumaria capreolata (white ramping-fumitory)
Fumaria muralis (common ramping-fumitory)
Fumaria officinalis (Common Fumitory)
Fumaria spp. (Fumitories)
Funaria hygrometrica (Bonfire moss)
Funaria spp.
Funastrum heterophyllum (Hartweg's climbing milkweed)
Funastrum spp.
Furcraea spp.
Gagea spp.
Gahnia aspera (Red-berried Saw-sedge)
Gahnia clarkei (tall saw-sedge)
Gahnia radula (Thatch Saw-sedge)
Gahnia sieberiana (Red-fruit Saw-sedge)
Gahnia spp. (Saw-sedges)
Gaillardia aristata (blanketflower)
Gaillardia × grandiflora (Hybrid Blanketflower)
Gaillardia pulchella (firewheel)
Gaillardia spp. (Blanketflowers)
Gaillardia x grandiflora 'Arizona Sun' (Arizona Sun Gaillardia)
Galactia spp. (Milkpeas)
Galanthus elwesii (Giant Snowdrop)
Galanthus ikariae (Ikarian Snowdrop)
Galanthus nivalis (Common Snowdrop)
Galax spp.
Galax urceolata (galax)
Galearis spectabilis (showy orchis)
Galearis spp.
Galega officinalis (common milkpea)
Galega spp.
Galeopsis bifida (Bifid Hemp-nettle)
Galeopsis spp. (Hempnettles)
Galeopsis tetrahit (Common hemp-nettle)
Galinsoga quadriradiata (shaggy soldier)
Galinsoga spp. (galinsogas)
Galium album (white bedstraw)
Galium angustifolium (Narrow-leaved Bedstraw)
Galium aparine (cleavers (native))
Galium boreale (Northern Bedstraw)
Galium circaezans (licorice bedstraw)
Galium mollugo (Hedge Bedstraw)
Galium odoratum (sweet woodruff)
Galium palustre (Common Marsh-bedstraw)
Galium saxatile (Heath Bedstraw)
Galium spp. (bedstraws)
Galium trifidum (small bedstraw (native))
Galium triflorum (fragrant bedstraw)
Galium verum (Lady's Bedstraw)
Gamochaeta pensylvanica (Pennsylvania Cudweed)
Gamochaeta spp. (Everlastings and Cudweeds)
Gardenia jasminoides (Gardenia)
Gardenia spp. (gardenias)
Garrya elliptica (coast silktassel)
Garrya spp. (silktassels)
Gastrodia sesamoides (Cinnamon Bells)
Gastrodia spp.
Gaudium laevigatum (Coast Teatree)
Gaudium myrsinoides (Heath Teatree)
Gaudium spp.
Gaudium trinervium (Paperbark Tea Tree)
Gaultheria hispidula (creeping snowberry)
Gaultheria mucronata (Chilean pernettya)
Gaultheria procumbens (wintergreen)
Gaultheria shallon (salal)
Gaultheria spp. (wintergreens)
Gaura (Wand Flower)
Gaylussacia baccata (black huckleberry)
Gaylussacia spp. (huckleberries)
Gazania × splendens (Garden Treasure Flower)
Gazania spp. (Treasure Flowers)
Geijera parviflora (Wilga)
Geijera salicifolia (Axe Gapper)
Geijera spp.
Geitonoplesium cymosum (Climbing Lily)
Geitonoplesium spp.
Gelidium spp. (Jellyweeds)
Gelsemium sempervirens (Carolina Jessamine)
Gelsemium spp.
Genista linifolia (needle-leaved broom)
Genista lydia (Lydia broom)
Genista monspessulana (French broom)
Genista pilosa (silkyleaf woadwaxen)
Genista spp. (Brooms)
Genista tinctoria (Dyer's Greenweed)
Gentiana andrewsii (closed bottle gentian)
Gentiana asclepiadea (Willow Gentian)
Gentiana × pallidocyanea (Hybrid Bottle Gentian)
Gentiana sceptrum (King's Scepter Gentian)
Gentiana spp. (Gentians)
Gentianella amarella (autumn gentian)
Gentianella spp. (dwarf gentians)
Geobalanus oblongifolius (Gopher apple)
Geobalanus spp.
Geraea canescens (Desert Sunflower)
Geraea spp.
Geranium caespitosum (pinewoods geranium)
Geranium cantabrigiense (Cambridge Geranium)
Geranium × cantabrigiense 'Karmina' (Karmina Cambridge Cranesbill)
Geranium carolinianum (Carolina crane's-bill)
Geranium dissectum (Cut-leaved crane's-bill)
Geranium endressii (French Crane's-bill)
Geranium 'Gerwat ROZANNE' (Rozanne geranium)
Geranium himalayense 'Baby Blue' (Baby Blue Geranium)
Geranium homeanum (Australasian Crane's-bill)
Geranium 'Johnson's Blue' (Johnson's Blue Geranium)
Geranium lucidum (shiny geranium)
Geranium macrorrhizum (Bigroot Geranium)
Geranium macrorrhizum 'Ingwersen's Variety' (Ingwersen's Variety)
Geranium maculatum (wild geranium)
Geranium maderense
Geranium molle (dovefoot geranium)
Geranium nodosum
Geranium oreganum (Western Geranium)
Geranium 'Patricia' (Patricia Geranium)
Geranium phaeum 'Samobor' (Samobor Geranium)
Geranium potentilloides (cinquefoil geranium)
Geranium pratense (Meadow Crane's-bill)
Geranium psilostemon (magenta cranesbill)
Geranium pusillum (Small-flowered Crane's-bill)
Geranium pyrenaicum (Hedgerow Crane's-bill)
Geranium richardsonii (Richardson's geranium)
Geranium robertianum (herb-Robert, stinky Bob)
Geranium rotundifolium (Roundleaf geranium)
Geranium × 'Rozanne' (Rozanne Cranesbill)
Geranium sanguineum (Bloody Crane's-bill)
Geranium sanguineum 'Album'
Geranium solanderi (Solander's geranium)
Geranium sylvaticum (wood crane's-bill)
Geranium tuberosum (Tuberous Geranium)
Geranium viscosissimum (sticky geranium)
Geranium wallichianum (Purple-vein geranium)
Geranium wlassovianum (Wlassov's Geranium)
Gerbera spp. (Gerbera Daisies)
Geum canadense (white avens)
Geum macrophyllum (large-leaved avens)
Geum rivale (Water Avens)
Geum spp. (avens)
Geum ssp. 'Cocktail Collection' (avens)
Geum triflorum (Prairie Smoke)
Geum urbanum (Wood Avens)
Geum vernum (Spring Avens)
Gilia capitata (bluehead gilia)
Gilia spp. (Gilias)
Gilia tricolor (bird's-eye gilia)
Gillenia spp.
Ginkgo biloba (ginkgo, maidenhair tree)
Ginkgo biloba 'Autumn Gold' (Autumn Gold Ginkgo)
Ginkgo biloba 'Jade Butterflies' (Jade Butterflies Ginkgo Tree)
Ginkgo biloba 'Mariken' (Ginkgo Biloba Mariken Tree)
Ginkgo biloba 'PNI 2720' (ginkgo)
Ginkgo biloba 'Princeton Sentry' (Princeton Sentry Columnar Ginkgo)
Ginkgo spp.
Gladiolus communis (Gladiolus)
Gladiolus communis ssp. byzantinus (Eastern Gladiolus)
Gladiolus × hortulanus (Large-flowered Gladiolus)
Gladiolus Hybrids (hardy gladiolus)
Gladiolus murielae (fragrant gladiolus)
Gladiolus spp. (Gladioli)
Glandora diffusa (lithodora)
Glandora spp.
Glandularia aristigera (South American mock vervain)
Glandularia bipinnatifida (Dakota mock vervain)
Glandularia canadensis (rose vervain)
Glandularia × hybrida (garden verbena)
Glandularia spp. (mock vervains)
Glaucium flavum (Yellow Horned Poppy)
Glaucium spp.
Glebionis coronaria (Garland Daisy)
Glebionis segetum (Corn Marigold)
Glebionis spp.
Glechoma hederacea (ground-ivy)
Glechoma spp. (ground-ivies)
Gleditsia spp. (honey locusts)
Gleditsia triacanthos (honey locust)
Gleichenia dicarpa (Pouched Coral Fern)
Gleichenia microphylla (scrambling coral-fern)
Gleichenia spp.
Glischrocaryon behrii (golden pennants)
Glischrocaryon spp.
Glochidion ferdinandi (Cheese Tree)
Glochidion spp.
Glossodia major (Waxlip Orchid)
Glossodia minor (Small Waxlip Orchid)
Glossodia spp.
Glyceria borealis (northern mannagrass)
Glyceria elata (tall mannagrass)
Glyceria fluitans (water manna grass)
Glyceria grandis (American Manna Grass)
Glyceria maxima (reed meadowgrass)
Glyceria spp. (Sweet Grasses)
Glycine clandestina (Twining Glycine)
Glycine spp. (Soybeans)
Glycine tabacina (Glycine Pea)
Glycyrrhiza lepidota (Wild Licorice)
Glycyrrhiza spp.
Gnaphalium spp.
Gnaphalium uliginosum (marsh cudweed)
Goeppertia insignis (Rattlesnake Plant)
Goeppertia kegeljanii (Calathea Musaica)
Goeppertia makoyana (Peacock Plant)
Goeppertia orbifolia (Round-Leaved Calathea)
Goeppertia ornata (Pinstripe Calathea)
Goeppertia spp.
Gomphocarpus fruticosus (Narrow-leaf Cotton Bush)
Gomphocarpus physocarpus (balloonplant)
Gomphocarpus spp.
Gompholobium grandiflorum (Large Wedge Pea)
Gompholobium huegelii (Common Wedge-pea)
Gompholobium latifolium (Golden Glory Pea)
Gompholobium spp.
Gomphrena celosioides (prostrate globe-amaranth)
Gomphrena globosa (Globe Amaranth)
Gomphrena spp.
Gonocarpus micranthus (creeping raspwort)
Gonocarpus spp.
Gonocarpus tetragynus (Common Raspwort)
Gonocarpus teucrioides (Raspwort)
Gonolobus spp.
Gonolobus suberosus (Anglepod)
Goodenia bellidifolia (Daisy-leaved Goodenia)
Goodenia blackiana (Black's goodenia)
Goodenia geniculata (Bent Goodenia)
Goodenia hederacea (Ivy Goodenia)
Goodenia heterophylla (Variable-leaved Goodenia)
Goodenia lanata (trailing Goodenia)
Goodenia mystrophylla (wild pansies)
Goodenia ovata (hop goodenia)
Goodenia pinnatifida (scrambled eggs)
Goodenia rotundifolia (Star Goodenia)
Goodenia spp. (goodenias)
Goodia lotifolia (Clover-leaved Poison)
Goodia spp.
Goodyera oblongifolia (Rattlesnake Plantain)
Goodyera pubescens (downy rattlesnake plantain)
Goodyera spp.
Gossia bidwillii (Python Tree)
Gossia spp.
Gossypium spp. (Cottons)
Gratiola peruviana (Austral Brooklime)
Gratiola spp.
Grevillea alpina (Mountain Grevillea)
Grevillea aquifolium (variable prickly grevillea)
Grevillea banksii (Scarlet Grevillea)
Grevillea buxifolia (Grey Spider Flower)
Grevillea 'Canberra Gem'
Grevillea crithmifolia
Grevillea juniperina
Grevillea lavandulacea (Lavender Grevillea)
Grevillea linearifolia (White Spider Flower)
Grevillea mucronulata (Green Spider Flower)
Grevillea robusta (silk oak)
Grevillea rosmarinifolia (rosemary grevillea)
Grevillea sericea (Pink Spider Flower)
Grevillea speciosa (Red Spider Flower)
Grevillea spp. (Grevilleas)
Grevillea victoriae (Royal Grevillea)
Grewia spp. (Donkeyberries)
Grimmia laevigata (Grimmia Dry Rock Moss)
Grimmia pulvinata (Grey-cushioned Grimmia)
Grimmia spp.
Grindelia camporum (Great Valley gumweed)
Grindelia ciliata (Spanish Gold)
Grindelia integrifolia (Puget Sound Gumweed)
Grindelia spp. (gumplants)
Grindelia squarrosa (Curlycup Gumweed)
Grindelia stricta (Oregon Gumplant)
Guioa semiglauca (Guioa)
Guioa spp.
Gunnera manicata (gunnera)
Gunnera spp. (Gunneras)
Gutierrezia sarothrae (Broom Snakeweed)
Gutierrezia spp. (matchweeds and snakeweeds)
Guzmania lingulata (Scarlet Star)
Guzmania spp. (Guzmania)
Gymnadenia conopsea (Fragrant Orchid)
Gymnadenia spp.
Gymnocalycium mihanovichii (Moon Cactus)
Gymnocalycium spp.
Gymnocarpium disjunctum (oak fern)
Gymnocarpium dryopteris (Northern Oak Fern)
Gymnocarpium spp. (oak ferns)
Gymnocladus dioicus (Kentucky coffee tree)
Gymnocladus spp.
Gymnostachys anceps (settler's flax)
Gymnostachys spp.
Gynatrix pulchella (Hemp Bush)
Gynatrix spp.
Gynochthodes jasminoides (sweet morinda)
Gynochthodes spp.
Gynura aurantiaca (Purple Passion Plant)
Gynura spp.
Gypsophila repens 'Rosea'
Gypsophila 'Rosenschleier'
Gypsophila spp.
Hackelia latifolia (Forest Hound’s-tongue)
Hackelia spp. (Stickseeds)
Hackelia suaveolens (sweet hound's-tongue)
Hackelia virginiana (virginia stickseed)
Hacquetia epipactis (hacqetia)
Hacquetia spp.
Hakea dactyloides (finger hakea)
Hakea decurrens (Bushy Needlewood)
Hakea laurina (Pincushion hakea)
Hakea lissocarpha (Honey Bush)
Hakea lissosperma (Mountain Needlewood)
Hakea mitchellii (desert Hakea)
Hakea prostrata (Harsh Hakea)
Hakea rostrata (Beaked Hakea)
Hakea salicifolia (Willow-leaved hakea)
Hakea sericea (Bushy needlebush)
Hakea spp. (Pincushion trees)
Hakea teretifolia (Dagger Hakea)
Hakea ulicina (Furze Hakea)
Hakonechloa macra (Hakone grass)
Hakonechloa macra 'All Gold' (All Gold Hakone Grass)
Hakonechloa macra 'Aureola' (Japanese Forest Grass)
Hakonechloa spp.
Halesia carolina (Carolina silverbell)
Halesia spp. (silverbells)
Haloragis spp.
Hamamelis mollis (Chinese witch hazel)
Hamamelis spp. (witch-hazels)
Hamamelis virginiana (Common Witch Hazel)
Hamamelis x intermedia (hybrid witch hazel)
Hamelia patens (Firebush)
Hamelia spp.
Handroanthus chrysotrichus (Golden Trumpet Tree)
Handroanthus impetiginosus (Pink Trumpet Tree)
Handroanthus spp.
Hardenbergia comptoniana (Native wisteria)
Hardenbergia spp.
Hardenbergia violacea (False Sarsaparilla)
Harpullia pendula (Black Tulip)
Harpullia spp.
Haworthia spp.
Haworthiopsis spp. (Sixsided Haworthias)
Hazardia spp.
Hazardia squarrosa (saw-toothed goldenbush)
Hedera helix (English Ivy)
Hedera helix 'Arborescens'
Hedera hibernica (Atlantic or Irish ivy)
Hedera spp. (ivies)
Hedwigia ciliata (Ciliate Hoarmoss)
Hedwigia spp. (Hoarmosses)
Hedycarya angustifolia (Australian mulberry)
Hedycarya spp.
Hedychium gardnerianum (Kahili ginger)
Hedychium spp. (Garland lillies)
Hedypnois rhagadioloides (Cretanweed)
Hedypnois spp.
Helenium (sneezeweeds)
Helenium amarum (Bitterweed)
Helenium autumnale (Sneezeweed)
Helenium flexuosum (Southern Sneezeweed)
Helenium 'Moerheim Beauty' (Moerheim Beauty Sneezeweed)
Helenium spp. (sneezeweed)
Helianthemum nummularium 'Cerise Queen' (Cerise Queen Sun Rose)
Helianthemum nummularium 'Fire Dragon' (Fire Dragon Sun Rose)
Helianthus angustifolius (Swamp Sunflower)
Helianthus annuus (Common Sunflower)
Helianthus debilis (cucumberleaf sunflower)
Helianthus divaricatus (woodland sunflower)
Helianthus grosseserratus (sawtooth sunflower)
Helianthus hirsutus (stiff-hair sunflower)
Helianthus maximiliani (Maximilian Perennial Sunflower)
Helianthus mollis (ashy sunflower)
Helianthus petiolaris (prairie sunflower)
Helianthus strumosus (pale-leaved woodland sunflower)
Helianthus tuberosus (Jerusalem artichoke)
Helichrysum leucopsideum (Satin Everlasting)
Helichrysum spp. (Everlasting-flowers)
Heliconia rostrata (Hanging Lobster Claw)
Heliconia spp. (Heliconias)
Helictotrichon sempervirens (blue oat grass)
Helictotrichon spp.
Heliomeris multiflora (showy goldeneye)
Heliomeris spp.
Heliopsis helianthoides var. scabra 'Summer Sun' (Summer Sun False Sunflower)
Heliopsis spp. (Oxeyes)
Heliotropium amplexicaule (fragrant heliotrope)
Heliotropium curassavicum (alkali heliotrope)
Heliotropium indicum (Indian Heliotrope)
Heliotropium spp. (Heliotropes)
Helleborus argutifolius (Corsican hellebore)
Helleborus atrorubens (dark red hellebore)
Helleborus foetidus (Stinking hellebore)
Helleborus orientalis (Lenten Rose)
Helleborus spp. (Hellebores)
Helleborus sternii (Stern's Hellebore)
Helleborus x hybridus (hybrid hellebore)
Helminthotheca echioides (bristly oxtongue)
Helminthotheca spp.
Helosciadium nodiflorum (Fool's Watercress)
Helosciadium spp.
Hemerocallis 'Bela Lugosi' (Bela Lugosi Daylily)
Hemerocallis 'Black Ambrosia' (Black Ambrosia Daylily)
Hemerocallis 'Buttered Popcorn' (Buttered Popcorn Daylily)
Hemerocallis 'Canadian Border Patrol' (Canadian Border Patrol Daylily)
Hemerocallis 'Custard Candy' (Custard Candy Daylily)
Hemerocallis 'Earlybird Cardinal' (Earlybird Cardinal Daylily)
Hemerocallis 'Ed Brown' (Ed Brown Daylily)
Hemerocallis 'Ed Murray' (Ed Murray Daylily)
Hemerocallis 'El Desperado' (El Desperado Daylily)
Hemerocallis 'Elegant Candy' (Elegant Candy Daylily)
Hemerocallis 'Fooled Me' (Fooled Me Daylily)
Hemerocallis 'French Lingerie' (French Lingerie Daylily)
Hemerocallis × 'Happy Returns' (Happy Returns Daylily)
Hemerocallis Hybrids (daylily)
Hemerocallis 'Janice Brown' (Janice Brown Daylily)
Hemerocallis 'Jolyene Nichole' (Jolyene Nichole Daylily)
Hemerocallis lilioasphodelus (yellow daylily)
Hemerocallis 'Moonlit Masquerade' (Moonlit Masquerade Daylily)
Hemerocallis 'Night Whispers' (Night Whispers Daylily)
Hemerocallis 'Prairie Blue Eyes' (Prairie Blue Eyes Daylily)
Hemerocallis 'Primal Scream' (Primal Scream Daylily)
Hemerocallis 'Purple de Oro' (Purple de Oro Daylily)
Hemerocallis 'Siloam Double Classic' (Siloam Double Classic)
Hemerocallis 'Singular Sensation' (Singular Sensation Daylily)
Hemerocallis spp. (daylilies)
Hemerocallis × 'Stella de Oro' (Stella de Oro Daylily)
Hemerocallis 'Strawberry Candy' (Strawberry Candy Daylily)
Hemerocallis 'Wineberry Candy' (Wineberry Candy Jumbo Daylily)
Hemizonia congesta (Hayfield Tarweed)
Hemizonia spp.
Hepatica acutiloba (sharp-lobed hepatica)
Hepatica americana (round-lobed hepatica)
Heptacodium spp.
Heptapleurum actinophyllum (Australian Umbrella Tree)
Heptapleurum arboricola (Miniature umbrella tree)
Heptapleurum delavayi
Heptapleurum spp. (umbrella trees)
Heracleum mantegazzianum (giant hogweed)
Heracleum maximum (cow-parsnip)
Heracleum sphondylium (hogweed)
Heracleum spp. (hogweeds)
Herbertia lahue (Prairie Nymph)
Herbertia spp.
Hermannia spp. (Dollsroses)
Hesperaloe parviflora (Red Yucca)
Hesperaloe spp.
Hesperis matronalis (dame's rocket)
Hesperis spp.
Hesperocallis spp.
Hesperocallis undulata (desert lily)
Hesperocyparis arizonica (Arizona Cypress)
×Hesperocyparis leylandii (Leyland cypress)
Hesperocyparis macrocarpa 'Goldcrest' (Goldcrest Monterey Cypress)
Hesperocyparis spp. (western cypresses)
Hesperoyucca spp.
Hesperoyucca whipplei (chaparral yucca)
Heteromeles arbutifolia (Toyon)
Heteromeles spp.
Heterotheca grandiflora (Telegraphweed)
Heterotheca spp. (False Goldenasters)
Heterotheca subaxillaris (Camphorweed)
Heterotheca villosa (Hairy Gold Aster)
Heuchera (alumroots)
Heuchera 'Amber Waves' (Amber Waves Coral Bells)
Heuchera americana (American Alumroot)
Heuchera chlorantha (Tall Alumroot)
Heuchera cylindrica (Round-Leaf Alumroot)
Heuchera 'Marmalade' (Marmalade Coral Bells)
Heuchera micrantha (native heuchera)
Heuchera micrantha (small-flowered alumroot)
Heuchera × 'Obsidian' (Obsidian Heuchera)
Heuchera spp. (coral bells)
Heuchera villosa 'Autumn Bride' (Autumn Bride Heuchera)
Heuchera villosa 'Caramel' (Caramel Heuchera)
× Heucherella 'Kimono' (Kimono Foamy Bells)
Heucherella spp.
Heucherella × 'Sweet Tea' (Sweet Tea Foamy Bells)
Hexasepalum spp.
Hexasepalum teres (rough buttonweed)
Hibbertia aspera (Rough Guinea Flower)
Hibbertia crinita (Long-hair Guinea-flower)
Hibbertia cuneiformis (Cutleaf Hibbertia)
Hibbertia dentata (Toothed Guinea Flower)
Hibbertia devitata (Smooth Guinea-flower)
Hibbertia exutiacies (Prickly Guinea-flower)
Hibbertia fasciculata (bundled hibbertia)
Hibbertia hypericoides (Yellow Buttercups)
Hibbertia linearis (Showy Guinea Flower)
Hibbertia obtusifolia (grey guinea flower)
Hibbertia riparia (Erect Guinea-flower)
Hibbertia scandens (Climbing Guinea flower)
Hibbertia sericea (Silky Guinea-flower)
Hibbertia spp. (guinea-flowers)
Hibbertia vestita (Hairy Guinea-flower)
Hibbertia virgata (Twiggy Guinea-flower)
Hibiscus × archeri (Red Hibiscus)
Hibiscus coccineus (Scarlet Rose Mallow)
Hibiscus denudatus (Rock Hibiscus)
Hibiscus heterophyllus (Rosella)
Hibiscus laevis (Halberd-leaf Rosemallow)
Hibiscus moscheutos (Hardy Hibiscus)
Hibiscus rosa-sinensis (Tropical Hibiscus)
Hibiscus rosa-sinensis 'Painted Lady' (Painted Lady Hibiscus Bush)
Hibiscus spp. (hibiscuses)
Hibiscus syriacus (Rose of Sharon)
Hibiscus syriacus 'Aphrodite' (Aphrodite Rose of Sharon)
Hibiscus syriacus 'Ardens' (Ardens Rose of Sharon)
Hibiscus syriacus 'Diana' (Diana Rose of Sharon)
Hibiscus syriacus 'Oiseau Bleu' (Bluebird Rose of Sharon)
Hibiscus syriacus 'Woodbridge' (Pink Rose of Sharon)
Hibiscus tiliaceus (sea hibiscus)
Hibiscus trionum (flower-of-an-hour)
Hieracium albiflorum (white hawkweed)
Hieracium aurantiacum (orange hawkweed)
Hieracium spp. (hawkweeds)
Hieracium umbellatum (Canada hawkweed)
Hieracium venosum (rattlesnakeweed)
Hippeastrum × johnsonii (St Joseph's Lily)
Hippeastrum spp. (Amaryllis)
Hippocrepis comosa (horseshoe vetch)
Hippocrepis spp.
Hippophae rhamnoides (Sea-buckthorn)
Hippophae spp.
Hippuris spp.
Hippuris vulgaris (Common Mare's Tail)
Hirschfeldia incana (Shortpod Mustard)
Hirschfeldia spp.
Histiopteris incisa (Water Fern)
Histiopteris spp.
Holcus lanatus (common velvet-grass)
Holcus mollis (creeping velvet grass)
Holcus spp.
Holodiscus discolor (ocean spray)
Holodiscus spp.
Homalanthus populifolius (Bleeding Heart)
Homalanthus spp.
Homalocephala spp.
Homalocephala texensis (Horse Crippler Cactus)
Homalothecium sericeum (Silky Wall Feather-moss)
Homalothecium spp. (homalothecium mosses)
Honckenya peploides (Sea Sandwort)
Honckenya spp.
Hookeria lucens (Shining Hookeria)
Hookeria spp.
Hordeum brachyantherum (Meadow Barley)
Hordeum jubatum (foxtail barley)
Hordeum murinum (wall barley)
Hordeum pusillum (little barley)
Hordeum spp. (Barleys)
Hordeum vulgare (Common Barley)
Hosta (hostas)
Hosta × 'Abiqua Drinking Gourd' (Abiqua Drinking Gourd Hosta)
Hosta 'Blue Angel' (Blue Angel Hosta)
Hosta 'Blue Mouse Ears' (Blue Mouse Ears Hosta)
Hosta 'Bressingham Blue' (Hosta Bressingham Blue)
Hosta 'Empress Wu' (Empress Wu Hosta)
Hosta 'Francee' (Francee Hosta)
Hosta × 'Great Expectations' (Great Expectations Hosta)
Hosta 'Guacamole' (Guacamole Hosta)
Hosta × 'Halcyon' (Halcyon Hosta)
Hosta Hybrids (hosta)
Hosta 'June' (June Hosta)
Hosta × 'Liberty' (Liberty Hosta)
Hosta 'Patriot' (Patriot Hosta)
Hosta 'Purple Heart'
Hosta × 'Spartacus' (Spartacus Hosta)
Hosta spp. (Hosta Verdant Medley Collection)
Hosta 'Stained Glass' (Stained Glass Hosta)
Hosta 'Sum and Substance' (Sum and Substance Hosta)
Hottonia palustris (Water Violet)
Hottonia spp.
Houstonia caerulea (azure bluet)
Houstonia longifolia (long-leaved bluets)
Houstonia purpurea (summer bluet)
Houstonia pusilla (tiny bluet)
Houstonia spp. (flowering bluets)
Houttuynia cordata (Chameleon Plant)
Houttuynia spp.
Hovea acutifolia (Purple Bush Pea)
Hovea heterophylla (common hovea)
Hovea spp.
Hoya australis (common waxflower)
Hoya carnosa 'Compacta' (Hindu Rope Plant)
Hoya heuschkeliana (variegated) (Hoya Heuschkeliana Variegated)
Hoya kerrii (Sweetheart Hoya)
Hoya meredithii (Hoya Meredithii)
Hoya multiflora (variegated) (Variegated Hoya Multiflora)
Hoya pubicalyx (Wax Plant)
Hoya spp. (Wax plants)
Humulus lupulus 'Aureus' (Golden Hop)
Humulus scandens (Japanese Hops)
Humulus spp. (Hops)
Huperzia lucidula (shining firmoss)
Huperzia selago (northern firmoss)
Huperzia spp. (temperate firmosses)
Hyacinthoides hispanica (Spanish bluebells)
Hyacinthoides × massartiana (Hybrid bluebell)
Hyacinthoides non-scripta (bluebell)
Hyacinthoides spp. (Bluebells)
Hyacinthus orientalis (hyacinth)
Hyacinthus spp. (Hyacinths)
Hydrangea anomala ssp. petiolaris (Climbing Hydrangea)
Hydrangea anomala ssp. petiolaris (climbing hydrangea)
Hydrangea anomala subsp. petiolaris (Climbing Hydrangea)
Hydrangea arborescens 'Abetwo' (Incrediball Hydrangea)
Hydrangea arborescens 'Annabelle' (Annabelle Hydrangea)
Hydrangea integrifolia (evergreen climbing hydrangea)
Hydrangea macrophylla (bigleaf hydrangea)
Hydrangea macrophylla 'Ayesha' (Ayesha Hydrangea)
Hydrangea macrophylla 'Bailmer' (Endless Summer Hydrangea)
Hydrangea macrophylla 'Blaumeise' (Blue Tit Hydrangea)
Hydrangea macrophylla 'Blushing Bride' (Blushing Bride Hydrangea)
Hydrangea macrophylla 'Endless Summer' (Endless Summer Hydrangea)
Hydrangea macrophylla 'Izu-no-hana' (Izu-no-hana Hydrangea)
Hydrangea macrophylla 'Mariesii' (Mariesii Hydrangea)
Hydrangea macrophylla 'Mariesii Lilacina' (Lilacina Lacecap Hydrangea)
Hydrangea macrophylla 'Merritt's Supreme' (Merritt's Supreme Hydrangea)
Hydrangea macrophylla 'Nikko Blue' (Nikko Blue Hydrangea)
Hydrangea macrophylla 'Pia' (Pia Hydrangea)
Hydrangea paniculata 'Grandiflora' (pee-gee hydrangea)
Hydrangea paniculata 'Jane' (Little Lime Hydrangea)
Hydrangea paniculata 'Limelight' (Limelight Peegee Hydrangea)
Hydrangea paniculata 'Renhy' (Vanilla Strawberry Hydrangea Tree)
Hydrangea paniculata 'Tardiva' (Tardiva Hydrangea)
Hydrangea petiolaris (climbing hydrangea)
Hydrangea quercifolia (oak-leaf hydrangea)
Hydrangea quercifolia 'Alice' (Alice Oakleaf Hydrangea)
Hydrangea quercifolia 'Pee Wee' (Pee Wee Oakleaf Hydrangea)
Hydrangea quercifolia 'Snow Queen' (Snow Queen Oakleaf Hydrangea)
Hydrangea serrata 'Blue Billow' (Blue Billow Hydrangea)
Hydrangea serrata 'Grayswood' (Grayswood Hydrangea)
Hydrangea serrata 'Preziosa' (Preziosa Hydrangea)
Hydrangea spp. (hydrangeas)
Hydrastis canadensis (Goldenseal)
Hydrastis spp.
Hydrilla spp.
Hydrilla verticillata (hydrilla)
Hydrocharis morsus-ranae (European Frog-bit)
Hydrocharis spp.
Hydrocotyle bonariensis (largeleaf pennywort)
Hydrocotyle hirta (Hairy Pennywort)
Hydrocotyle laxiflora (Stinking Pennywort)
Hydrocotyle novae-zeelandiae
Hydrocotyle ranunculoides (floating marsh pennywort)
Hydrocotyle spp. (water pennyworts)
Hydrocotyle umbellata (manyflower marshpennywort)
Hydrocotyle vulgaris (Marsh Pennywort)
Hydrophyllum appendiculatum (great waterleaf)
Hydrophyllum canadense (Broad-leaf Waterleaf)
Hydrophyllum capitatum (ballhead waterleaf)
Hydrophyllum macrophyllum (Large-leaf water leaf)
Hydrophyllum spp. (Waterleaves)
Hydrophyllum tenuipes (Pacific waterleaf)
Hydrophyllum virginianum (Virginia waterleaf)
Hylocereus spp.
Hylocereus undatus (Dragon Fruit)
Hylocomiadelphus spp.
Hylocomiadelphus triquetrus (rough goose neck moss)
Hylocomium splendens (stairstep moss)
Hylocomium spp.
Hylodesmum glutinosum (pointed-leaved tick-trefoil)
Hylodesmum nudiflorum (naked-flowered tick-trefoil)
Hylodesmum spp.
Hylotelephium 'Herbstfreude' (Autumn Joy Sedum)
Hylotelephium × mottramianum (Autumn Joy)
Hylotelephium spp. (Live-forever)
Hylotelephium telephium (Orpine)
Hymenocallis spp. (spider lilies)
Hymenopappus scabiosaeus (Carolina Woollywhite)
Hymenopappus spp. (Woollywhites)
Hymenophyllum cupressiforme (Common Filmy-fern)
Hymenophyllum spp. (filmy ferns)
Hymenosporum flavum (Australian frangipani)
Hymenosporum spp.
Hyophorbe lagenicaulis (Bottle Palm)
Hyophorbe spp.
Hypericum androsaemum (Tutsan)
Hypericum calycinum (St. John's wort)
Hypericum elodes (Marsh St John's-wort)
Hypericum gentianoides (pineweed)
Hypericum gramineum (Small St John's Wort)
Hypericum hirsutum (Hairy St John's-wort)
Hypericum humifusum (Trailing St John's-wort)
Hypericum Hybrids (hybrid hypericum)
Hypericum hypericoides (St. Andrew's cross)
Hypericum kalmianum (Kalm St. John's Wort)
Hypericum maculatum (Imperforate St John's-wort)
Hypericum mutilum (Dwarf St. John's Wort)
Hypericum perforatum (common St. Johnswort)
Hypericum prolificum (shrubby St. John's-wort)
Hypericum pulchrum (Slender St John's-wort)
Hypericum punctatum (spotted St. John's wort)
Hypericum spp. (St. John's worts)
Hypericum stragulum (low St. John's wort)
Hypericum tetrapetalum (fourpetal St. Johnswort)
Hypericum tetrapterum (Square Stemmed Saint John's Wort)
Hypnum andoi (mamillate plait-moss)
Hypnum cupressiforme (Cypress-leaved Plait-moss)
Hypnum jutlandicum (Heath Plait-moss)
Hypnum spp.
Hypocalymma angustifolium (White Myrtle)
Hypocalymma spp.
Hypochaeris glabra (Smooth Cat's Ear)
Hypochaeris radicata (hairy cat's-ear)
Hypochaeris spp. (Cat's-Ears)
Hypoestes phyllostachya (Polka Dot Plant)
Hypoestes spp.
Hypolaena fastigiata (Tassel Rope-rush)
Hypolaena spp.
Hypolepis muelleri (Harsh Ground-fern)
Hypolepis spp.
Hypoxis hirsuta (yellow star grass)
Hypoxis hygrometrica (Golden Weather-grass)
Hypoxis spp. (Stargrasses)
Hyptis alata (Musky mint)
Hyptis spp.
Hyssopus officinalis ssp. aristatus (Dwarf Hyssop)
Hyssopus spp.
Hysterobaeckea behrii (Broom Baeckea)
Hysterobaeckea spp.
Iberis saxatilis (rock candytuft)
Iberis sempervirens (candytuft)
Iberis spathulata (Pyrenean Candytuft)
Iberis spp. (Candytufts)
Ilex aquifolium (English holly)
Ilex aquifolium 'Ferox Argentea' (variegated porcupine holly)
Ilex × attenuata (savannah holly)
Ilex cassine (dahoon holly)
Ilex cornuta (Chinese holly)
Ilex crenata (Japanese holly)
Ilex decidua (possumhaw)
Ilex glabra (gallberry)
Ilex meserveae (Meserve Holly)
Ilex mucronata (Mountain holly)
Ilex × 'Nellie R. Stevens' (Nellie R. Stevens Holly)
Ilex opaca (American Holly)
Ilex spp. (hollies)
Ilex verticillata (common winterberry)
Ilex x meserveae (blue-leaved hybrid holly)
Iliamna rivularis (Streambank Globemallow)
Iliamna spp.
Illicium spp.
Impatiens capensis (spotted jewelweed)
Impatiens glandulifera (policeman's helmet)
Impatiens hawkeri (New Guinea Impatiens)
Impatiens omeiana (Golden Impatiens)
Impatiens pallida (pale jewelweed)
Impatiens parviflora (small balsam)
Impatiens walleriana (bedding impatiens)
Imperata spp.
Indigofera australis (Australian Indigo)
Indigofera miniata (Scarlet Pea)
Indigofera spp. (Indigos)
Inga edulis (Ice Cream Bean)
Inga spp.
Inula spp.
Ipheion spp.
Ipheion uniflorum 'Wisley Blue' (Wisley Blue Spring Starflower)
Ipomoea batatas 'Beauregard' (Beauregard Sweet Potato)
Ipomoea cairica (Mile-a-minute vine)
Ipomoea cordatotriloba (Tievine)
Ipomoea hederacea (ivy-leaved morning-glory)
Ipomoea imperati (beach morning-glory)
Ipomoea indica (oceanblue morning glory)
Ipomoea lacunosa (White Morning-glory)
Ipomoea × multifida (Cardinal Climber)
Ipomoea pandurata (wild potato vine)
Ipomoea pes-caprae (Beach Morning Glory)
Ipomoea purpurea (common morning-glory)
Ipomoea sagittata (Saltmarsh Morning-glory)
Ipomopsis aggregata (Scarlet Gilia)
Ipomopsis rubra (standing cypress)
Ipomopsis spp. (Skyrockets)
Iresine spp. (bloodleaves)
Iris domestica (Blackberry Lily)
Iris ensata (Japanese iris)
Iris ensata 'Cascade Spice' (Cascade Spice Japanese Iris)
Iris florentina (Florentine iris)
Iris × germanica (Bearded iris)
Iris germanica
Iris germanica 'Autumn Circus' (Autumn Circus Reblooming Bearded Iris)
Iris germanica 'Beverly Sills' (Beverly Sills Reblooming Iris)
Iris germanica 'Blatant' (Blatant Reblooming Iris)
Iris germanica 'Brilliant Idea' (Brilliant Idea Bearded Iris)
Iris germanica 'Champagne Elegance' (Champagne Elegance Reblooming Iris)
Iris germanica 'City Lights' (City Lights Reblooming Iris)
Iris germanica 'Harvest of Memories' (Harvest of Memories Reblooming Iris)
Iris germanica 'Immortality' (Immortality Reblooming Bearded Iris)
Iris germanica 'Oreo' (Oreo Bearded Iris)
Iris germanica 'Rosalie Figge' (Rosalie Figge Reblooming Iris)
Iris germanica 'Social Graces' (Social Graces Bearded Iris)
Iris germanica 'Superstition' (Superstition Bearded Iris)
Iris germanica 'Tiger Honey' (Tiger Honey Bearded Iris)
Iris germanica 'Victoria Falls' (Victoria Falls Reblooming Iris)
Iris × hollandica (Dutch iris)
Iris × hybrida
Iris 'Kent Pride'
Iris laevigata
Iris louisiana 'Black Gamecock' (Black Gamecock Louisiana Iris)
Iris macrosiphon (Bowltube Iris)
Iris missouriensis (Western Blue Flag Iris)
Iris pallida 'Variegata' (Variegated Sweet Iris)
Iris paradoxa (paradoxical iris)
Iris pseudacorus (Yellow Iris)
Iris setosa (Beachhead Iris)
Iris sibirica (Siberian iris)
Iris spp. (Irises)
Iris 'Superstition'
Iris tenax (Oregon Flag Iris)
Iris × thompsonii
Iris tuberosa
Iris versicolor (northern blue flag)
Iris virginica (Virginia Iris)
Isatis spp.
Isatis tinctoria
Isocoma menziesii (Coastal Goldenbush)
Isocoma spp.
Isolepis cernua
Isolepis spp.
Isopogon anemonifolius (Broad-leaved Drumsticks)
Isopogon anethifolius (Narrow-leaf Drumsticks)
Isopogon ceratophyllus (Horny Cone-bush)
Isopogon spp.
Isotoma spp.
Itea spp.
Itea virginica (Virginia sweetspire)
Iva annua (Sumpweed)
Iva frutescens (marsh elder)
Iva spp.
Ixia spp. (Corn lilies)
Ixodia achillaeoides (sand ixodia)
Ixodia spp.
Ixora coccinea (Jungle flame)
Ixora spp. (ixoras)
Jacaranda mimosifolia (Jacaranda)
Jacaranda spp. (jacarandas)
Jacksonia scoparia (winged broom-pea)
Jacksonia spp.
Jacobaea aquatica (Marsh Ragwort)
Jacobaea erucifolia (Hoary Ragwort)
Jacobaea maritima (dusty miller)
Jacobaea spp. (ragworts)
Jacobaea vulgaris (tansy ragwort)
Jagera pseudorhus (Fern Top)
Jagera spp.
Jasione montana (Sheep's Bit Scabious)
Jasione spp.
Jasminum nudiflorum (winter jasmine)
Jasminum polyanthum (Pink Jasmine)
Jasminum spp. (jasmine)
Jasminum stephanense (Pink Jasmine)
Jatropha spp. (Physic Nuts)
Jeffersonia diphylla (twinleaf)
Jeffersonia spp.
Johnstonella angustifolia (narrow-leaved cryptantha)
Johnstonella spp.
Jovibarba spp.
Juglans californica (California Black Walnut)
Juglans cinerea (Butternut)
Juglans hindsii (northern California black walnut)
Juglans nigra (black walnut)
Juglans regia (English walnut)
Juglans spp. (Walnuts)
Juncus acuminatus (Knotty-leaf Rush)
Juncus acutiflorus (Sharp-flowered Rush)
Juncus articulatus (jointed rush)
Juncus balticus (Baltic Rush)
Juncus bufonius (Toad rush)
Juncus conglomeratus (Compact Rush)
Juncus effusus (soft rush)
Juncus ensifolius (dagger-leaf rush)
Juncus kraussii (Sea Rush)
Juncus pallidus (Great Soft-rush)
Juncus patens (Spreading Rush)
Juncus spp. (Rushes)
Juncus squarrosus (heath rush)
Juncus tenuis (Path Rush)
Juncus usitatus (australian rush)
Juniperus ashei (Ashe juniper)
Juniperus californica (California Juniper)
Juniperus chinensis 'Blue Point' (Blue Point Juniper)
Juniperus chinensis 'Kaizuka' (Hollywood Juniper)
Juniperus communis (common juniper)
Juniperus communis 'Gold Cone' (Gold Cone Juniper)
Juniperus conferta (shore juniper)
Juniperus conferta 'Blue Pacific' (Blue Pacific Shore Juniper)
Juniperus conferta 'Silver Mist' (Silver Mist Shore Juniper)
Juniperus deppeana (alligator juniper)
Juniperus grandis (Sierra juniper)
Juniperus horizontalis (creeping juniper)
Juniperus horizontalis 'Lime Glow' (Lime Glow Juniper)
Juniperus horizontalis 'Wiltonii' (Blue Rug Juniper)
Juniperus monosperma (One-seed Juniper)
Juniperus osteosperma (Utah Juniper)
Juniperus procumbens 'Nana' (Dwarf Japanese Garden Juniper)
Juniperus sabina 'Tamariscifolia' (Tam Juniper)
Juniperus scopulorum (Rocky Mountain Juniper)
Juniperus spp. (junipers)
Juniperus squamata 'Blue Carpet' (Blue Carpet Singleseed Juniper)
Juniperus squamata 'Blue Star' (Blue Star Juniper)
Juniperus virginiana 'Brodie' (Brodie Eastern Red Cedar)
Justicia americana (American water-willow)
Justicia californica (chuparosa)
Justicia fulvicoma (Orange Shrimp Plant)
Justicia pilosella (Gregg's tube tongue)
Justicia spp.
Kaempferia spp.
Kalanchoe blossfeldiana (Flaming Katy)
Kalanchoe delagoensis (Mother of Millions)
Kalanchoe × houghtonii (Alligator plant)
Kalanchoe spp. (Kalanchoes)
Kalimeris spp.
Kalmia angustifolia (sheep laurel)
Kalmia latifolia (mountain laurel)
Kalmia latifolia 'Elf' (Elf Mountain Laurel)
Kalmia latifolia 'Sarah' (Sarah Mountain Laurel)
Kalmia microphylla (Western Bog Laurel)
Kalmia polifolia (Bog Laurel)
Kalmia spp.
Keckiella cordifolia (heartleaf keckiella)
Keckiella spp.
Kennedia prostrata (Running Postman)
Kennedia rubicunda (Dusky coral pea)
Kennedia spp.
Kerria japonica (Japanese kerria)
Kerria japonica 'Picta' (Variegated Japanese Kerria)
Kerria japonica 'Pleniflora' (double kerria)
Kerria spp.
Kindbergia oregana (Oregon Beaked Moss)
Kindbergia praelonga (Common Feather-moss)
Kindbergia spp.
Kingia australis (bullanock)
Kingia spp.
Kirengeshoma palmata (yellow waxbells)
Kirengeshoma spp.
Knautia arvensis (Field Scabious)
Knautia macedonica (Macedonian Scabious)
Knautia spp.
Kniphofia Hybrids (torch lily, red hot poker)
Kniphofia spp. (Pokers)
Kniphofia uvaria (Red Hot Poker)
Koeleria macrantha (Prairie Junegrass)
Koeleria spp.
Koelreuteria paniculata (goldenrain tree)
Koelreuteria spp.
Koenigia alpina
Koenigia campanulata (Lesser Knotweed)
Koenigia spp.
Kosteletzkya pentacarpos (Saltmarsh mallow)
Kosteletzkya spp.
Krameria bicolor (White Rhatany)
Krameria erecta (Littleleaf Rhatany)
Krameria lanceolata (Trailing Rhatany)
Krameria spp.
Krascheninnikovia lanata (Winterfat)
Krascheninnikovia spp.
Krigia biflora (Two-flower Dwarf-dandelion)
Krigia spp. (Dwarf dandelions)
Krigia virginica (Virginia dwarfdandelion)
Kroenleinia grusonii (golden barrel cactus)
Kroenleinia spp.
Kummerowia spp.
Kummerowia striata (Japanese Clover)
Kunzea ambigua (Butterfly Bush)
Kunzea capitata (Pink Kunzea)
Kunzea leptospermoides (Yarra burgan)
Kunzea pomifera (Muntries)
Kunzea spp.
Laburnum anagyroides (golden chain tree)
Laburnum spp. (Laburnums)
Laburnum x watereri (Goldenchain Tree)
Lachenalia spp. (Cape Cowslips)
Lactuca biennis (tall blue lettuce)
Lactuca canadensis (Canada wild lettuce)
Lactuca floridana (woodland lettuce)
Lactuca sativa 'Bibb' (Bibb Lettuce)
Lactuca sativa 'Buttercrunch' (Buttercrunch Lettuce)
Lactuca sativa 'Great Lakes' (Great Lakes Lettuce)
Lactuca sativa 'Red Sails' (Red Sails Lettuce)
Lactuca sativa 'Romaine' (Romaine Lettuce)
Lactuca sativa var. capitata (Head Lettuce)
Lactuca sativa var. crispa (Leaf Lettuce)
Lactuca sativa var. longifolia (Romaine Lettuce)
Lactuca serriola (prickly lettuce)
Lactuca spp. (wild lettuces)
Lactuca virosa (bitter lettuce)
Lagenophora spp.
Lagenophora stipitata (Blue Bottle-daisy)
Lagenophora sublyrata (slender bottle-daisy)
Lagerstroemia (crape-myrtles)
Lagerstroemia indica 'Bellini Grape' (Bellini Grape Crape Myrtle)
Lagerstroemia indica 'Catawba' (Catawba Crape Myrtle)
Lagerstroemia indica 'Muskogee' (Muskogee Crape Myrtle Tree)
Lagerstroemia indica 'Natchez' (Natchez Crape Myrtle)
Lagerstroemia indica 'Pink Velour' (Pink Velour Crape Myrtle)
Lagerstroemia indica 'Pocomoke' (Pocomoke Crape Myrtle)
Lagerstroemia indica 'Red Rocket' (Red Rocket Crape Myrtle Tree)
Lagerstroemia indica 'Tonto' (Tonto Crape Myrtle Tree)
Lagerstroemia indica 'Tuscarora' (Tuscarora Crape Myrtle)
Lagerstroemia indica 'Zuni' (Zuni Crape Myrtle)
Lagerstroemia spp. (crape myrtle)
Lagunaria patersonia (Norfolk Island hibiscus)
Lagunaria spp.
Lagurus ovatus (Hare's Tail Grass)
Lagurus spp.
Lambertia formosa (Mountain Devil)
Lambertia spp.
Lamiastrum galeobdolon (yellow archangel)
Lamiastrum spp.
Lamium album (White deadnettle)
Lamium amplexicaule (henbit deadnettle)
Lamium galeobdolon (yellow archangel)
Lamium hybridum (cutleaf deadnettle)
Lamium maculatum (deadnettle)
Lamium maculatum 'Beacon Silver'
Lamium purpureum (red deadnettle)
Lamium spp. (deadnettles and archangels)
Lampranthus spp. (dewplants)
Lamprocapnos spectabilis (bleeding heart)
Lamprocapnos spp.
Lantana × hybrida (New Gold Lantana)
Lantana montevidensis (creeping lantana)
Lantana spp. (Lantanas)
Lantana strigocamara (Lantana)
Lantana urticoides (Texas lantana)
Lapageria rosea
Lapageria spp.
Laportea canadensis (wood nettle)
Laportea spp. (wood nettles)
Lapsana communis (nipplewort)
Lapsana spp.
Larix (larches)
Larix decidua (European Larch)
Larix decidua 'Pendula' (Weeping European Larch)
Larix kaempferi (Japanese Larch)
Larix kaempferi 'Diana' (Diana Larch)
Larix kaempferi 'Pendula' (Weeping Japanese Larch)
Larix laricina (tamarack)
Larix occidentalis (Western Larch)
Larix spp. (larch)
Larrea spp.
Larrea tridentata (Creosote Bush)
Laserpitium siler
Laserpitium spp.
Lasiopetalum ferrugineum (Rusty Petals)
Lasiopetalum spp.
Lasthenia californica (California goldfields)
Lasthenia gracilis (common goldfields)
Lasthenia spp. (goldfields)
Lathraea clandestina (Purple Toothwort)
Lathraea spp.
Lathraea squamaria (Common Toothwort)
Lathyrus hirsutus (Hairy Vetchling)
Lathyrus japonicus (seaside pea)
Lathyrus latifolius (broad-leaved sweet pea)
Lathyrus linifolius (Bitter Vetch)
Lathyrus nissolia (Grass Vetchling)
Lathyrus pratensis (meadow pea)
Lathyrus spp. (sweet peas and vetchlings)
Lathyrus tuberosus
Lathyrus vestitus (Pacific pea)
Laurencia spp.
Laurus nobilis (bay laurel)
Laurus spp.
Lavandula angustifolia (English lavender)
Lavandula angustifolia 'Hidcote' (Hidcote Lavender)
Lavandula angustifolia 'Munstead' (Munstead Lavender)
Lavandula × intermedia (Lavandin)
Lavandula × intermedia 'Provence' (Provence Lavender)
Lavandula spp. (Lavenders)
Lavandula stoechas (Spanish lavender)
Lavatera spp.
Laxmannia gracilis (Slender Wire Lily)
Laxmannia spp.
Layia glandulosa (whitedaisy tidytips)
Layia platyglossa (tidy tips)
Layia spp.
Ledebouria spp.
Leichhardtia rostrata (Common Milk Vine)
Leichhardtia spp.
Lemna minor (Common Duckweed)
Lemna spp. (Duckweeds)
Leonotis leonurus (lion's tail)
Leonotis spp. (lion's ears)
Leontodon hispidus (Rough Hawkbit)
Leontodon saxatilis (Hairy Hawkbit)
Leontodon spp. (hawkbits)
Leonurus cardiaca (common motherwort)
Leonurus spp.
Lepechinia calycina (California Pitcher Sage)
Lepechinia spp.
Lepidium campestre (field peppergrass)
Lepidium didymum (Lesser swine-cress)
Lepidium draba (Heart-podded Hoary Cress)
Lepidium latifolium (perennial pepperweed)
Lepidium nitidum (Shining Pepperweed)
Lepidium spp. (Pepperweeds)
Lepidium virginicum (Virginia pepperweed)
Lepidospartum spp.
Lepidospartum squamatum (California Broomsage)
Lepidosperma carphoides (black rapier-sedge)
Lepidosperma elatius (tall sword-sedge)
Lepidosperma gladiatum (Coast Sword-sedge)
Lepidosperma laterale (variable sword-sedge)
Lepidosperma semiteres (Wire rapier-sedge)
Lepidosperma spp.
Leporella fimbriata (Hare Orchid)
Leporella spp.
Leptecophylla parvifolia (Mountain Pinkberry)
Leptecophylla spp.
Leptinella spp.
Leptoceras menziesii (Rabbit Orchid)
Leptoceras spp.
Leptorhynchos spp.
Leptorhynchos squamatus (Scaly-buttons)
Leptorhynchos tenuifolius (Wiry Buttons)
Leptosiphon parviflorus (variable linanthus)
Leptosiphon spp.
Leptospermum continentale (prickly tea-tree)
Leptospermum lanigerum (Woolly Teatree)
Leptospermum polygalifolium (Tantoon)
Leptospermum scoparium (Mānuka)
Leptospermum spp. (Tea Trees)
Leptospermum squarrosum (Peach-flowered Tea Tree)
Leschenaultia biloba (Blue Leschenaultia)
Leschenaultia spp.
Lespedeza capitata (round-headed bush clover)
Lespedeza cuneata (Chinese bushclover)
Lespedeza hirta (hairy lespedeza)
Lespedeza spp. (bush clovers and lespedezas)
Lespedeza virginica (slender bush clover)
Leucaena leucocephala (White leadtree)
Leucaena spp. (leadtrees)
Leucanthemum maximum (max chrysanthemum)
Leucanthemum × superbum 'Becky' (Becky Shasta Daisy)
Leucanthemum vulgare (Oxeye Daisy)
Leucanthemum x superbum (Shasta daisy)
Leucanthemum x superbum 'Alaska' (Alaska Shasta Daisy)
Leucobryum albidum (white moss)
Leucobryum glaucum (Pincushion Moss)
Leucobryum spp. (Leucobryum mosses)
Leucocrinum montanum (common starlily)
Leucocrinum spp.
Leucojum aestivum (spring snowflakes)
Leucojum spp.
Leucophyllum frutescens 'Green Cloud' (Green Cloud Texas Sage)
Leucophyllum spp. (silverleaves)
Leucophyta brownii (Cushion Bush)
Leucophyta spp.
Leucopogon affinis (Lance Beard-heath)
Leucopogon microphyllus (Small-leafed White Beard)
Leucopogon parviflorus (coastal beard-heath)
Leucopogon spp.
Leucopogon verticillatus (Tassel Flower)
Leucopogon virgatus (common beard-heath)
Leucospermum cuneiforme
Leucospermum × hybridum (Pincushion Hybrids)
Leucospermum spp.
Leucothoë axillaris (drooping leucothoe)
Leucothoë fontanesiana 'Girard's Rainbow' (Rainbow leucothoe)
Leucothoe spp.
Leucothoë spp.
Lewinskya affinis (Wood Bristle-moss)
Lewinskya spp.
Lewisia columbiana (Columbia Lewisia)
Lewisia cotyledon (lewisia)
Lewisia rediviva (Bitterroot)
Lewisia spp.
Lewisiopsis spp.
Leycesteria formosa (Himalayan honeysuckle)
Leycesteria spp.
Leymus condensatus (giant wild rye)
Leymus mollis (Dune Grass)
Leymus spp.
Liatris aspera (rough blazing star)
Liatris ligulistylis (Meadow Blazing Star)
Liatris punctata (dotted gayfeather)
Liatris pycnostachya (prairie blazing star)
Liatris spicata (prairie star)
Liatris spicata 'Kobold' (Kobold Liatris)
Liatris spp. (blazing-stars)
Libertia chilensis
Libertia grandiflora
Libertia spp.
Licuala grandis (Ruffled Fan Palm)
Licuala spp.
Ligularia dentata (ligularia)
Ligularia spp.
Ligusticum lucidum
Ligusticum scoticum
Ligusticum spp.
Ligustrum japonicum (Waxleaf Privet)
Ligustrum japonicum 'Texanum' (waxleaf privot)
Ligustrum lucidum (tree privet)
Ligustrum obtusifolium (border privet)
Ligustrum ovalifolium (garden privet)
Ligustrum ovalifolium 'Aureum' (golden privet)
Ligustrum quihoui (Quihoui privet)
Ligustrum sinense 'Variegatum' (Variegated Privet)
Ligustrum spp. (privets)
Ligustrum vulgare (common privet)
Lilium (Asiatic Hybrids) (Asiatic lilies)
Lilium candidum (Madonna lily)
Lilium hansonii
Lilium lancifolium (tiger lily)
Lilium michiganense (Michigan lily)
Lilium (Orienpet Hybrids) (orienpet lilies)
Lilium (Oriental Hybrids) (oriental lilies)
Lilium pardalinum (Leopard Lily)
Lilium philadelphicum (Wood Lily)
Lilium spp. (true lilies)
Lilium superbum (Turk's-cap lily)
Limbarda crithmoides (Golden Samphire)
Limbarda spp.
Limonium carolinianum (Carolina Sea Lavender)
Limonium spp. (Sea-Lavenders)
Limonium vulgare (Common Sea-lavender)
Linanthus pungens (Granite Prickly Phlox)
Linanthus spp.
Linaria canadensis (Canada toadflax)
Linaria dalmatica (Balkan toadflax)
Linaria purpurea (toadflax)
Linaria repens (Pale Toadflax)
Linaria spp. (Toadflaxes)
Linaria texana (Texas toadflax)
Linaria vulgaris (common toadflax)
Lindera benzoin (northern spicebush)
Lindera spp. (spicebushes)
Lindheimera spp.
Lindheimera texana (Texas yellow star)
Lindsaea linearis (Screw Fern)
Lindsaea microphylla (lacy wedge fern)
Lindsaea spp.
Linnaea borealis (twinflower)
Linnaea spp.
Linospadix monostachyus (Walking stick palm)
Linospadix spp.
Linum bienne (Pale flax)
Linum catharticum (Fairy Flax)
Linum grandiflorum (Scarlet Flax)
Linum lewisii (Lewis flax)
Linum marginale (Australian Flax)
Linum perenne
Linum spp. (Flaxes)
Linum usitatissimum (common flax)
Liquidambar spp. (sweetgums)
Liquidambar styraciflua (sweetgum)
Liquidambar styraciflua 'Worplesdon' (Worplesdon Sweet Gum)
Liriodendron spp. (Tulip trees)
Liriodendron tulipifera (tulip tree)
Liriodendron tulipifera 'Aureomarginatum' (Variegated Tulip Tree)
Liriodendron tulipifera 'Fastigiatum' (Fastigiate Tulip Tree)
Liriope muscari (lily turf)
Liriope muscari 'Big Blue' (Big Blue Lilyturf)
Liriope muscari 'Monroe White' (Monroe White Lilyturf)
Liriope muscari 'Royal Purple' (Royal Purple Lilyturf)
Liriope muscari 'Variegata' (Variegated Lilyturf)
Liriope spicata (Creeping Lilyturf)
Lissanthe spp.
Lissanthe strigosa (peach heath)
Litchi spp.
Lithocarpus spp.
Lithodora diffusa (Lithodora)
Lithodora spp.
Lithophragma affine (San Francisco woodland-star)
Lithophragma heterophyllum (hillside woodland star)
Lithophragma parviflorum (smallflower woodland star)
Lithophragma spp. (woodland stars)
Lithospermum canescens (hoary puccoon)
Lithospermum caroliniense (hairy puccoon)
Lithospermum incisum (narrowleaf puccoon)
Lithospermum officinale (Common Gromwell)
Lithospermum ruderale (western stoneseed)
Lithospermum spp. (stoneseeds, puccoons, and gromwells)
Lithothamnion spp. (Crustose coralline algae)
Lithotoma axillaris (rock isotome)
Lithotoma spp.
Livistona australis (Australian Fan Palm)
Livistona chinensis (Chinese Fan Palm)
Livistona spp.
Lobelia anceps (angled lobelia)
Lobelia cardinalis (cardinal flower)
Lobelia erinus (bedding lobelia)
Lobelia gibbosa (tall lobelia)
Lobelia inflata (Indian tobacco)
Lobelia laxiflora var. angustifolia (Narrow-leaved Mexican Lobelia)
Lobelia puberula (downy lobelia)
Lobelia purpurascens (White Root)
Lobelia siphilitica (Great Blue Lobelia)
Lobelia spicata (pale-spiked lobelia)
Lobelia spp. (Lobelias)
Lobelia trigonocaulis (forest lobelia)
Lobularia maritima (sweet alyssum)
Lobularia spp.
Lolium arundinaceum (tall fescue)
Lolium × boucheanum (Hybrid Ryegrass)
Lolium perenne (Perennial Ryegrass)
Lolium spp. (Ryegrasses)
Lomandra confertifolia (clumped matrush)
Lomandra filiformis (wattle mat-rush)
Lomandra hystrix (green mat-rush)
Lomandra multiflora (Many Flowered Matrush)
Lomandra obliqua (Fish Bones)
Lomandra spp.
Lomatia ilicifolia (Holly Lomatia)
Lomatia silaifolia (Crinkle Bush)
Lomatia spp.
Lomatium dasycarpum (woollyfruit desertparsley)
Lomatium spp. (Biscuitroots)
Lomatium triternatum (Ternate Desert-parsley)
Lomatium utriculatum (Spring Gold Biscuitroot)
Lonicera × bella (showy fly honeysuckle)
Lonicera canadensis (American fly-honeysuckle)
Lonicera ciliosa (trumpet honeysuckle)
Lonicera fragrantissima (Winter honeysuckle)
Lonicera hispidula (Pink Honeysuckle)
Lonicera involucrata (twinberry honeysuckle)
Lonicera involucrata (twinberry honeysuckle)
Lonicera japonica 'Aureoreticulata' (Golden Net Honeysuckle)
Lonicera ligustrina (Boxleaf Honeysuckle)
Lonicera ligustrina var. yunnanensis (box honeysuckle)
Lonicera ligustrina var. yunnanensis 'Baggesen's Gold' (Golden box honeysuckle)
Lonicera maackii (Amur honeysuckle)
Lonicera morrowii (Morrow's honeysuckle)
Lonicera nitida (Boxleaf Honeysuckle)
Lonicera pileata (box-leaved honeysuckle)
Lonicera × purpusii (Winter Beauty Honeysuckle)
Lonicera sempervirens (Coral Honeysuckle)
Lonicera spp. (honeysuckles)
Lonicera subspicata (Southern Honeysuckle)
Lonicera tatarica (Tatarian honeysuckle)
Lonicera xylosteum (Fly Honeysuckle)
Lophiolepis eriophora (Woolly Thistle)
Lophiolepis spp.
Lophocolea bidentata (Bifid Crestwort)
Lophocolea semiteres (Southern Crestwort)
Lophocolea spp.
Lophostemon confertus (Brush Box)
Lophostemon spp.
Lophostemon suaveolens (swamp box)
Loropetalum chinense (Jazz Hands® Pink Loropetalum)
Loropetalum chinense var. rubrum (Ruby Loropetalum)
Loropetalum spp.
Lotus corniculatus (bird's-foot trefoil)
Lotus pedunculatus (big bird's-foot trefoil)
Lotus spp. (bird's-foot trefoils)
Ludwigia alternifolia (Seedbox)
Ludwigia octovalvis (Mexican Primrose-willow)
Ludwigia palustris (Water Purslane)
Ludwigia peploides (floating primrose-willow)
Ludwigia peruviana (Peruvian primrose-willow)
Ludwigia spp. (Primrose-willows)
Lunaria annua (moneyplant)
Lunaria rediviva
Lunaria spp.
Lunularia cruciata (Crescent-cup liverwort)
Lunularia spp.
Lupinus albicaulis (Sicklekeel Lupine)
Lupinus albifrons (Silver Bush Lupine)
Lupinus arboreus (coastal bush lupine)
Lupinus argenteus (silvery lupine)
Lupinus arizonicus (Arizona lupine)
Lupinus bicolor (Miniature Lupine)
Lupinus concinnus (bajada lupine)
Lupinus hirsutissimus (Stinging Lupine)
Lupinus latifolius (wild lupine)
Lupinus lepidus (Dwarf Lupine)
Lupinus microcarpus (chick lupine)
Lupinus nanus (Sky Lupine)
Lupinus perennis (Sundial Lupine)
Lupinus polyphyllus (garden lupine)
Lupinus rivularis (Riverbank Lupine)
Lupinus sparsiflorus (Coulter's lupine)
Lupinus spp. (lupines)
Lupinus succulentus (arroyo lupine)
Lupinus texensis (Texas bluebonnet)
Lupinus truncatus (collared annual lupine)
Luzula campestris (Field woodrush)
Luzula meridionalis (Common Wood-rush)
Luzula nivea
Luzula parviflora (small-flowered wood rush)
Luzula pilosa (Hairy Woodrush)
Luzula spp. (woodrushes)
Luzula sylvatica (Great Woodrush)
Lychnis alpina (Alpine Campion)
Lychnis chalcedonica (Maltese cross)
Lychnis coronaria (rose campion)
Lychnis flos-cuculi
Lychnis spp.
Lycianthes spp.
Lycium andersonii (Anderson Thornbush)
Lycium barbarum (Goji Berry)
Lycium ferocissimum (African boxthorn)
Lycium spp. (boxthorns)
Lycopodium clavatum (stag's-horn clubmoss)
Lycopodium deuterodensum (Bushy Clubmoss)
Lycopodium spp. (ground and creeping clubmosses)
Lycopus americanus (American bugleweed)
Lycopus europaeus (European water-horehound)
Lycopus spp. (water horehounds)
Lycopus uniflorus (northern bugleweed)
Lycoris radiata (red spider lily)
Lycoris spp.
Lycoris squamigera (Surprise Lily)
Lygodesmia spp.
Lygodesmia texana (Texas Skeleton Plant)
Lygodium japonicum (Japanese climbing fern)
Lygodium spp. (climbing ferns)
Lyonia fruticosa (coastal plain staggerbush)
Lyonia ligustrina (He-huckleberry)
Lyonia lucida (fetterbush lyonia)
Lyonia spp.
Lyperanthus spp.
Lyperanthus suaveolens (brown beaks)
Lysiana exocarpi (Harlequin Mistletoe)
Lysiana spp.
Lysichiton americanus (swamp lanterns, skunk cabbage)
Lysichiton spp.
Lysimachia arvensis (scarlet pimpernel)
Lysimachia borealis (northern starflower)
Lysimachia ciliata 'Purpurea' (purple leaf loosestrife)
Lysimachia clethroides (Gooseneck Loosestrife)
Lysimachia europaea (Arctic Starflower)
Lysimachia latifolia (Western Starflower)
Lysimachia loeflingii (Blue Scarlet Pimpernel)
Lysimachia maritima (Sea Milkwort)
Lysimachia nemorum (Yellow Pimpernel)
Lysimachia nummularia (creeping Jenny)
Lysimachia punctata (Dotted Loosestrife)
Lysimachia quadrifolia (whorled loosestrife)
Lysimachia spp. (Loosestrifes)
Lysimachia tenella (Bog Pimpernel)
Lysimachia terrestris (swamp candles)
Lysimachia vulgaris (Yellow Loosestrife)
Lythrum alatum (Winged Loosestrife)
Lythrum hyssopifolia (Hyssop Loosestrife)
Lythrum salicaria (purple loosestrife)
Lythrum spp. (Lythrum Loosestrifes)
Maackia spp.
Macadamia integrifolia (Macadamia Nut)
Macadamia spp.
Macaranga spp.
Macaranga tanarius (Elephant's Ear)
Machaeranthera spp.
Machaeranthera tanacetifolia (Tahoka daisy)
Macleaya cordata (plume poppy)
Macleaya spp.
Maclura cochinchinensis (Cockspur Thorn)
Maclura pomifera (Osage-orange)
Maclura spp.
Macroptilium atropurpureum (Purple Bush-Bean)
Macroptilium lathyroides (Phasey Bean)
Macroptilium spp.
Macrozamia communis (burrawang)
Macrozamia riedlei (Zamia Palm)
Macrozamia spp.
Madia elegans (Common Madia)
Madia gracilis (grassy tarweed)
Madia spp. (tarweeds)
Magnolia 'Elizabeth' (Elizabeth Magnolia)
Magnolia fraseri (Fraser Magnolia)
Magnolia 'Galaxy' (Galaxy Magnolia)
Magnolia grandiflora (southern magnolia)
Magnolia grandiflora 'Edith Bogue' (Edith Bogue Magnolia)
Magnolia grandiflora 'Little Gem' (Little Gem Magnolia)
Magnolia 'Iolanthe' (Iolanthe Magnolia)
Magnolia 'Jane' (Jane Magnolia)
Magnolia liliiflora (Lily Magnolia)
Magnolia liliiflora 'Nigra' (Black Lily Magnolia)
Magnolia × loebneri 'Leonard Messel' (Leonard Messel Magnolia)
Magnolia maudiae var. platypetala (Broad-petaled Maud's Magnolia)
Magnolia sieboldii (Oyama magnolia)
Magnolia × soulangeana (saucer magnolia)
Magnolia spp. (magnolias)
Magnolia stellata (star magnolia)
Magnolia stellata 'Royal Star' (Royal Star Magnolia Tree)
Magnolia × 'Susan' (Susan Magnolia Bush)
Magnolia tripetala (umbrella magnolia)
Magnolia virginiana (Sweetbay Magnolia)
Mahonia aquifolium (Oregon grape)
Mahonia nervosa (dwarf Oregon grape)
Mahonia repens (creeping mahonia)
Mahonia spp.
Maianthemum bifolium (May Lily)
Maianthemum canadense (Canada mayflower)
Maianthemum dilatatum (false lily of the valley)
Maianthemum racemosum (false Solomon's Seal)
Maianthemum spp. (mayflowers and false Solomon's seals)
Maianthemum stellatum (star-flowered false Solomon's seal)
Maianthemum tatsienense
Maireana brevifolia (Short-leaf Bluebush)
Maireana spp.
Malacothamnus fasciculatus (southern coastal bushmallow)
Malacothamnus spp. (bushmallows)
Malacothrix glabrata (desert dandelion)
Malacothrix saxatilis (Cliff Aster)
Malacothrix spp.
Malaisia scandens (Burnie Vine)
Malaisia spp.
Malephora spp. (Fingerfigs)
Mallotus claoxyloides (Green Kamala)
Mallotus philippensis (Kamala)
Mallotus spp.
Malosma laurina (laurel sumac)
Malosma spp.
Malpighia emarginata (Acerola Cherry)
Malpighia spp.
Malus (crabapple)
Malus 'Adirondack' (Adirondack Crabapple)
Malus baccata (Siberian crabapple)
Malus 'Butterball'
Malus domestica (apple)
Malus domestica 'Pristine' (Pristine Apple)
Malus 'Evereste' (Evereste Crabapple)
Malus × floribunda (Japanese Crabapple)
Malus floribunda (Crabapple)
Malus fusca (crabapple)
Malus sargentii (Sargent Crabapple Tree)
Malus sylvestris (European Wild Apple)
Malus toringo 'Tina' (Tina Crabapple)
Malus 'Van Eseltine'
Malva arborea (Tree Mallow)
Malva moschata (musk mallow)
Malva multiflora (Cretan mallow)
Malva neglecta (dwarf mallow, cheese plant)
Malva parviflora (cheeseweed mallow)
Malva spp. (Mallows)
Malvastrum coromandelianum (three-lobe false mallow)
Malvastrum spp.
Malva sylvestris (Common Mallow)
Malvaviscus arboreus (Turk's cap)
Malvaviscus spp.
Mammillaria spp. (pincushion cactuses)
Mandevilla sanderi (Pink Mandevilla)
Mandevilla spp. (Rocktrumpets)
Manfreda spp.
Mangave spp.
Mangifera spp. (mangoes)
Manihot spp.
Marah fabacea (California manroot)
Marah macrocarpa (Chilicothe)
Marah oregana (bigroot, manroot)
Marah spp. (Man-roots)
Maranta leuconeura (Prayer Plant)
Maranta leuconeura 'Lemon Lime' (Lemon Lime Prayer Plant)
Maranta leuconeura var. erythroneura (Red Prayer Plant)
Maranta spp.
Marchantia polymorpha (Common Liverwort)
Marchantia spp.
Marrubium incanum
Marrubium spp.
Marrubium vulgare (White Horehound)
Marsilea drummondii (Common Nardoo)
Marsilea spp.
Matelea reticulata (Pearl Milkweed)
Matelea spp.
Matricaria chamomilla (German Chamomile)
Matricaria discoidea (pineapple weed)
Matricaria spp. (German chamomiles and pineapple-weeds)
Matteuccia spp.
Matteuccia struthiopteris (Ostrich Fern)
Matthiola bicornis (night-scented stock)
Matthiola spp. (Stock)
Maurandella antirrhiniflora (Snapdragon Vine)
Maurandella spp.
Maxillaria spp. (tiger orchids)
Mazus pumilus (Asian mazus)
Mazus spp.
Meconopsis 'Lingholm' (blue poppy)
Meconopsis spp.
Medeola spp.
Medeola virginiana (Cucumber Root)
Medicago arabica (Spotted medick)
Medicago lupulina (black medic)
Medicago polymorpha (bur clover)
Medicago sativa (Alfalfa)
Medicago spp. (medicks)
Megathyrsus maximus (Guinea Grass)
Megathyrsus spp.
Melaleuca alternifolia
Melaleuca armillaris (Bracelet Honey-myrtle)
Melaleuca bracteata (black tea-tree)
Melaleuca citrina (crimson bottlebrush)
Melaleuca decussata (Totem-poles)
Melaleuca ericifolia (Swamp Paperbark)
Melaleuca fulgens
Melaleuca lanceolata (Moonah)
Melaleuca leucadendra (Weeping Paperbark)
Melaleuca linariifolia (Snow-in-Summer)
Melaleuca linearis (Narrow-leaved Bottlebrush)
Melaleuca nesophila (Showy Honey-myrtle)
Melaleuca nodosa (prickly-leaved paperbark)
Melaleuca paludicola (river bottlebrush)
Melaleuca quadrifida (One-sided Bottlebrush)
Melaleuca quinquenervia (Broad-leaved paperbark)
Melaleuca salicina (Willow bottlebrush)
Melaleuca spp. (bottlebrushes)
Melaleuca squamea (swamp honey-myrtle)
Melaleuca squarrosa (scented paperbark)
Melaleuca styphelioides (Prickly-leaved Paperbark)
Melaleuca thymifolia (thyme honey-myrtle)
Melaleuca uncinata (broombush)
Melaleuca velutina
Melaleuca viminalis (weeping bottlebrush)
Melampodium leucanthum (blackfoot daisy)
Melampodium spp.
Melampyrum lineare (narrowleaf cow wheat)
Melampyrum pratense (Common Cow-wheat)
Melampyrum spp.
Melastoma malabathricum (Malabar Melastome)
Melastoma spp. (melastomes)
Melia azedarach (Chinaberry)
Melianthus spp.
Melia spp.
Melica altissima 'Atropurpurea'
Melica nutans
Melica spp. (melicgrasses)
Melica uniflora (Wood Melick)
Melichrus spp.
Melichrus urceolatus (urn heath)
Melicope elleryana (pink-flowered doughwood)
Melicope spp.
Melicytus dentatus (tree violet)
Melicytus spp.
Melilotus albus (White Sweetclover)
Melilotus altissimus (tall melilot)
Melilotus indicus (small melilot)
Melilotus officinalis (Yellow Sweetclover)
Melilotus spp. (melilots and sweetclovers)
Melinis repens (Natal Grass)
Melinis spp.
Meliosma spp.
Melissa officinalis (Lemon Balm)
Melissa spp.
Melittis melissophyllum subsp. albida
Melittis spp.
Melothria pendula (creeping cucumber)
Melothria spp.
Menispermum canadense (moonseed)
Menispermum spp.
Mentha aquatica (watermint)
Mentha canadensis (Wild Mint)
Mentha × piperita (Peppermint)
Mentha pulegium (Pennyroyal)
Mentha spicata (Spearmint)
Mentha spp. (mints)
Mentha suaveolens (Apple Mint)
Mentzelia albicaulis (Whitestem Blazingstar)
Mentzelia involucrata (sand blazingstar)
Mentzelia laevicaulis (Giant Blazingstar)
Mentzelia spp. (Blazingstars)
Menyanthes spp.
Menyanthes trifoliata (Bogbean)
Mercurialis annua (Annual mercury)
Mercurialis perennis (Dog's Mercury)
Mercurialis spp.
Mertensia ciliata (mountain bluebells)
Mertensia platyphylla (Broadleaf Bluebell)
Mertensia spp. (Bluebells)
Mertensia virginica (Virginia Bluebells)
Mesembryanthemum crystallinum (Crystalline ice plant)
Mesembryanthemum spp. (ice plants)
Mespilus spp.
Metalasia spp. (Blombushes)
Metasequoia glyptostroboides (dawn redwood)
Metasequoia spp. (dawn redwoods)
Metrosideros polymorpha (ʻŌhiʻa Lehua)
Metrosideros spp. (Rātā and allies)
Metzgeria furcata (Forked Veilwort)
Metzgeria spp.
Metzgeria violacea (Bluish Veilwort)
Meum athamanticum
Meum spp.
Miconia spp.
Micranthes californica (California Saxifrage)
Micranthes spp. (Early saxifrages)
Micranthes stellaris (Hairy Kidney-wort)
Micranthes virginiensis (Virginia saxifrage)
Microbiota decussata (Russian Cypress)
Microbiota spp.
Microgramma spp. (Snakeferns)
Microlaena spp.
Microlaena stipoides (Weeping-grass)
Micropus californicus (Q-tips)
Micropus spp.
Microseris spp.
Microseris walteri (Murnong)
Microsorum diversifolium (Kangaroo Paw Fern)
Microsorum musifolium (Crocodile Fern)
Microsorum pustulatum (hound's tongue fern)
Microsorum spp.
Microsorum thailandicum (Blue Oil Fern)
Microstegium spp.
Microstegium vimineum (Japanese stiltgrass)
Microsteris gracilis (slender phlox)
Microsteris spp.
Microtis arenaria (Pale Onion-orchid)
Microtis parviflora (slender onion-orchid)
Microtis spp. (Onion Orchids)
Microtis unifolia (common onion-orchid)
Mikania scandens (climbing hempvine)
Mikania spp. (hempvines)
Milium effusum (Wood Millet)
Milium spp.
Mimosa microphylla (littleleaf sensitive-briar)
Mimosa nuttallii (Catclaw Briar)
Mimosa pudica (Sensitive Plant)
Mimosa quadrivalvis (Fourvalve Mimosa)
Mimosa spp. (Sensitive Plants)
Mimosa strigillosa (sunshine mimosa)
Mimulus alatus (sharpwing monkeyflower)
Mimulus ringens (Allegheny monkeyflower)
Mimulus spp.
Mirabilis jalapa (Marvel of Peru)
Mirabilis laevis (Wishbone Bush)
Mirabilis multiflora (Colorado Four o'Clock)
Mirabilis nyctaginea (Wild Four o'Clock)
Mirabilis spp. (four o'clocks)
Mirbelia rubiifolia (Heathy Mirbelia)
Mirbelia spp.
Miscanthus sinensis (Miscanthus)
Miscanthus sinensis 'Cosmopolitan' (Cosmopolitan Maiden Grass)
Miscanthus sinensis 'Gracillimus' (Gracillimus Maiden Grass)
Miscanthus sinensis 'Morning Light' (Morning Light Maiden Grass)
Miscanthus sinensis 'Silberfeder' (Silver Feather Maiden Grass)
Miscanthus sinensis 'Strictus' (Porcupine Grass)
Miscanthus sinensis 'Variegatus' (Variegated Maiden Grass)
Miscanthus sinensis 'Zebrinus' (Zebra Grass)
Miscanthus spp. (Silvergrasses)
Mitchella repens (partridgeberry)
Mitchella spp.
Mitella breweri
Mitella diphylla (twoleaf miterwort)
Mitella ovalis (Coastal Miterwort)
Mitella spp.
Mitellastra caulescens (Leafy Miterwort)
Mitellastra spp.
Mitrasacme polymorpha (Mitre Weed)
Mitrasacme spp.
Mnium hornum (Horn Calcareous Moss)
Mnium spp.
Modiola caroliniana (Bristly Mallow)
Modiola spp.
Moehringia spp.
Moehringia trinervia (Three-nerved Sandwort)
Molinia caerulea 'Variegata' (Variegated Purple Moor Grass)
Molinia spp.
Mollugo spp.
Mollugo verticillata (green carpetweed)
Moltkia doerfleri
Moltkia spp.
Momordica charantia (Bitter Melon)
Momordica spp.
Monarda (beebalms and bergamots)
Monarda bradburiana (Eastern Bee Balm)
Monarda citriodora (lemon beebalm)
Monarda didyma (Bee Balm)
Monarda didyma 'Jacob Cline' (Jacob Cline Bee Balm)
Monarda fistulosa (Wild Bergamot)
Monarda 'Gardenview Scarlet' (Bee Balm Gardenview Scarlet)
Monarda 'Marshall's Delight' (Marshall's Delight Bee Balm)
Monarda 'Petite Delight' (Petite Delight Bee Balm)
Monarda punctata (spotted horsemint)
Monarda spp. (Bee Balm Mix)
Monardella odoratissima (mountain coyote mint)
Monardella spp. (Monardellas)
Monardella villosa (Coyote Mint)
Monnina spp.
Monoptilon bellioides (Mojave desertstar)
Monoptilon spp.
Monotoca elliptica (Tree Broom-heath)
Monotoca scoparia (Prickly Broom-heath)
Monotoca spp.
Monotropa hypopitys (pinesap)
Monotropa spp.
Monotropa uniflora (Ghost Pipe)
Monstera adansonii (Swiss Cheese Vine)
Monstera deliciosa (Swiss Cheese Plant)
Monstera siltepecana (Silver Monstera)
Monstera spp.
Montia fontana (blinks)
Montia parvifolia (Littleleaf Miner's-Lettuce)
Montia spp.
Moraea flaccida (Great Tulip)
Moraea setifolia (Paper Glasstulp)
Moraea spp. (Cape Tulips)
Morella californica (California wax myrtle)
Morella cerifera (Wax Myrtle)
Morella pensylvanica (northern bayberry)
Morella spp. (Bayberries)
Moringa oleifera (Moringa)
Moringa spp. (Moringas)
Morus rubra (red mulberry)
Morus spp. (Mulberries)
Muehlenbeckia adpressa (Climbing Lignum)
Muehlenbeckia spp.
Muellerina eucalyptoides (creeping mistletoe)
Muellerina spp.
Muhlenbergia capillaris (Pink Muhly Grass)
Muhlenbergia dumosa (Bamboo Muhly)
Muhlenbergia lindheimeri (Lindheimer's Muhly)
Muhlenbergia reverchonii (Seep Muhly)
Muhlenbergia rigens (deergrass)
Muhlenbergia spp. (muhly)
Mukdenia rossii 'Karasuba' (Karasuba Mukdenia)
Mukdenia spp.
Mummenhoffia alliacea (garlic penny-cress)
Mummenhoffia spp.
Muraltia spp. (Purplegorses)
Murdannia graminea (Grass Lily)
Murdannia spp.
Murraya spp.
Musa acuminata (Dwarf Banana Plant)
Musa basjoo (Hardy Banana)
Musa × paradisiaca (Plantain)
Musa spp. (Bananas)
Musa textilis (abacá, Manila hemp)
Muscari armeniacum (grape hyacinth)
Muscari botryoides (common grape hyacinth)
Muscari neglectum (Musk Hyacinth)
Muscari spp. (Grape hyacinths)
Mussaenda spp.
Mutarda arvensis (charlock)
Mutarda nigra (Black Mustard)
Mutarda spp.
Mycelis muralis (wall lettuce)
Mycelis muralis (wall lettuce)
Mycelis spp.
Myoporum boninense (Boobialla)
Myoporum insulare (common boobialla)
Myoporum montanum (waterbush)
Myoporum parvifolium
Myoporum petiolatum (Sticky Boobialla)
Myoporum spp. (Ngaios)
Myosotis arvensis (field forget-me-not)
Myosotis discolor (Changing Forget-me-not)
Myosotis latifolia (broadleaf forget-me-not)
Myosotis ramosissima (Early Forget-me-not)
Myosotis scorpioides (water forget-me-not)
Myosotis spp. (Forget-me-nots)
Myosotis sylvatica (forget-me-not)
Myosotis sylvatica 'Bluesylva' (Bluesylva Forget-Me-Not)
Myosotis sylvatica 'Rosylva' (Rosylva Forget-Me-Not)
Myrica californica (California Wax Myrtle; California Bayberry)
Myrica gale (Sweetgale)
Myrica spp.
Myriophyllum aquaticum (parrotfeather)
Myriophyllum spicatum (Eurasian watermilfoil)
Myriophyllum spp. (Milfoils)
Myriopteris spp. (lip ferns)
Myrrhis odorata (sweet cicely)
Myrrhis spp.
Myrsine howittiana (Brush Muttonwood)
Myrsine spp. (Colicwood)
Myrsine variabilis (Variable Muttonwood)
Myrtus communis
Myrtus spp.
Nabalus albus (white rattlesnake root)
Nabalus altissimus (tall rattlesnake root)
Nabalus spp. (rattlesnake roots)
Nabalus trifoliolatus (three-leaved rattlesnake root)
Narcissus (daffodil)
Narcissus 'February Gold' (February Gold Daffodil)
Narcissus × incomparabilis (Nonesuch Daffodil)
Narcissus 'Jack Snipe' (Jack Snipe Daffodil)
Narcissus 'King Alfred' (King Alfred Daffodil)
Narcissus × medioluteus (Primrose-peerless)
Narcissus 'Mount Hood' (Mount Hood Daffodil)
Narcissus pseudonarcissus (wild daffodil)
Narcissus 'Saint Keverne' (Saint Keverne Daffodil)
Narcissus 'Thalia' (Thalia Daffodil)
Narthecium ossifragum (bog asphodel)
Narthecium spp.
Nassella pulchra (purple needlegrass)
Nassella spp.
Nassella tenuissima (Mexican feather/hair grass)
Nasturtium officinale (Watercress)
Nasturtium spp. (Watercresses)
Neillia spp.
Nekemias arborea (peppervine)
Nekemias spp.
Neltuma glandulosa (honey mesquite)
Neltuma odorata (western honey mesquite)
Neltuma spp. (mesquites)
Neltuma velutina (velvet mesquite)
Nelumbo lutea (American lotus)
Nelumbo spp.
Nematanthus
Nematanthus spp. (goldfish plant)
Nemesia spp. (Lionfaces)
Nemophila heterophylla (White nemophila)
Nemophila menziesii (Menzies' baby blue eyes)
Nemophila phacelioides (Texas baby blue eyes)
Nemophila spp. (baby blue eyes and allies)
Neolitsea dealbata (Bolly Gum)
Neolitsea spp.
Neoregelia spp.
Neottia nidus-avis (bird's-nest orchid)
Neottia ovata (Common Twayblade)
Neottia spp.
Nepenthes spp. (tropical pitcher-plants)
Nepeta racemosa 'Walker's Low' (Walker's Low catmint)
Nepeta spp. (catmints)
Nephroia carolina (Carolina snailseed)
Nephroia spp.
Nephrolepis cordifolia (Fishbone Fern)
Nephrolepis exaltata (Boston Fern)
Nephrolepis obliterata (Kimberley Queen Fern)
Nephrolepis spp. (sword ferns)
Nerine spp.
Nerium spp. (oleanders)
Neurachne alopecuroidea (foxtail mulga grass)
Neurachne spp.
Nicandra physalodes (apple-of-Peru)
Nicandra spp.
Nicotiana alata (flowering tobacco)
Nicotiana glauca (tree tobacco)
Nicotiana obtusifolia (desert tobacco)
Nicotiana spp. (tobaccos)
Nicotiana sylvestris (fragrant tobacco nightshade)
Nigella damascena (love-in-a-mist)
Nigella spp. (Love-in-a-mist)
Nitraria billardierei (nitre bush)
Nitraria spp.
Noccaea fendleri (Fendler's pennycress)
Noccaea spp.
Notelaea longifolia (Large Mock-olive)
Notelaea microcarpa (small-fruited mock olive)
Notelaea spp.
Nothochelone nemorosa (Woodland Beardtongue)
Nothochelone spp.
Nothofagus cunninghamii (Myrtle Beech)
Nothofagus spp.
Notholithocarpus densiflorus (Tanoak)
Notholithocarpus spp.
Nothoscordum bivalve (crowpoison)
Nothoscordum spp.
Nuphar advena (spatterdock)
Nuphar lutea (yellow water-lily)
Nuphar polysepala (western yellow pond-lily)
Nuphar spp. (yellow pond-lilies)
Nuphar variegata (Variegated Yellow Pond-Lily)
Nuytsia floribunda (Western Australian Christmas Tree)
Nuytsia spp.
Nymphaea alba (European White Waterlily)
Nymphaea × marliacea (coloured water-lily)
Nymphaea odorata (American white waterlily)
Nymphaea spp. (Waterlilies)
Nymphoides indica (Water Snowflake)
Nymphoides peltata (water fringe)
Nymphoides spp.
Nyssa spp. (Tupelos)
Nyssa sylvatica (sour gum, tupelo)
Obolaria spp.
Obolaria virginica (pennywort)
Oceaniopteris cartilaginea (hammock fern)
Oceaniopteris spp.
Ochna serrulata (Small-leaved plane)
Ochna spp.
Ocimum basilicum 'Purple Ruffles' (Purple Ruffles Basil)
Ocimum spp. (Basils)
Ocimum tenuiflorum (Holy Basil)
Oclemena acuminata (whorled wood aster)
Oclemena spp.
Odontites spp.
Odontites vernus (Red Bartsia)
Odontites vulgaris (Red Odontites)
Odontonema spp.
Oemleria cerasiformis (osoberry)
Oemleria spp.
Oenanthe crocata (Hemlock Water-dropwort)
Oenanthe pimpinelloides (Corky-fruited Water-dropwort)
Oenanthe sarmentosa (water-parsley)
Oenanthe spp.
Oenothera biennis (evening primrose)
Oenothera capillifolia (Berlandier's sundrops)
Oenothera cespitosa (fragrant evening primrose)
Oenothera curtiflora (velvetweed)
Oenothera elata (tall evening primrose)
Oenothera fruticosa (evening primrose)
Oenothera gaura (biennial beeblossom)
Oenothera glazioviana (Large-flowered Evening-primrose)
Oenothera laciniata (cutleaf evening primrose)
Oenothera lindheimeri (wandflower)
Oenothera macrocarpa (bigfruit evening primrose)
Oenothera pallida (Pale Evening Primrose)
Oenothera parviflora (northern evening-primrose)
Oenothera speciosa (pinkladies, pink evening primrose)
Oenothera spp. (evening primroses, sundrops, and beeblossoms)
Oenothera suffrutescens (Scarlet Beeblossom)
Oenothera suffulta (roadside gaura)
Oenothera tetragona
Oenothera triloba (Stemless Evening Primrose)
Olea europaea (Olive Tree)
Olearia argophylla (musk daisy-bush)
Olearia axillaris (Coastal Daisy-Bush)
Olearia lirata (snowy daisy-bush)
Olearia macrodonta
Olearia phlogopappa (Asthma Bush)
Olearia ramulosa (Twiggy Daisy-Bush)
Olearia spp. (Daisybushes)
Olea spp. (Olives)
Olneya spp.
Olneya tesota (desert ironwood)
Oncidium sphacelatum (Spider Orchid Bush)
Oncidium spp. (dancing lady orchids)
Oncosiphon pilulifer (stinknet)
Oncosiphon spp.
Onobrychis spp. (Sainfoins)
Onobrychis viciifolia (Sainfoin)
Onoclea sensibilis (sensitive fern)
Onoclea spp.
Ononis spinosa (Spiny restharrow)
Ononis spp. (restharrows)
Onopordum acanthium (Scotch thistle)
Onopordum spp. (cotton thistles)
Ophioglossum spp.
Ophioglossum vulgatum (southern adder's-tongue)
Ophiopogon japonicus (Mondo Grass)
Ophiopogon planiscapus
Ophiopogon planiscapus 'Nigrescens' (Black mondo grass)
Ophiopogon spp. (Lily-Turfs)
Ophrys apifera (Bee Orchid)
Ophrys insectifera (Fly Orchid)
Ophrys spp. (Bee Orchids)
Oplismenus hirtellus (Basket Grass)
Oplismenus spp. (Basketgrasses)
Oplopanax horridus (devil's club)
Oplopanax spp.
Opuntia austrina (Florida Pricklypear)
Opuntia basilaris (Beavertail Pricklypear)
Opuntia cespitosa (Eastern Pricklypear)
Opuntia × columbiana (Columbia Pricklypear)
Opuntia × demissa
Opuntia engelmannii (Engelmann's Pricklypear)
Opuntia ficus-indica (Prickly Pear Cactus)
Opuntia fragilis (Brittle Pricklypear)
Opuntia humifusa (low pricklypear)
Opuntia lindheimeri (Texas Pricklypear)
Opuntia littoralis (Coastal Pricklypear)
Opuntia macrorhiza (prairie pricklypear)
Opuntia microdasys (Bunny Ears Cactus)
Opuntia phaeacantha (Brown-spined Pricklypear)
Opuntia polyacantha (Plains Pricklypear)
Opuntia santa-rita (Santa Rita Prickly Pear)
Opuntia spp. (Prickly Pears)
Opuntia tomentosa (Woollyjoint Pricklypear)
Opuntia × vaseyi (Vasey's Pricklypear)
Orchis anthropophora (Man Orchid)
Orchis mascula (Early Purple Orchid)
Orchis purpurea (Lady Orchid)
Orchis spp.
Oreocarya spp. (Perennial Cryptanthas)
Oreopanax spp.
Oreopteris limbosperma (Lemon-scented Fern)
Oreopteris spp.
Oreostemma alpigenum (Alpine Aster)
Oreostemma spp.
Origanum dictamnus (dittany of Crete)
Origanum majorana (Sweet Marjoram)
Origanum spp. (Marjorams)
Origanum vulgare (Oregano)
Origanum vulgare 'Aureum' (golden oregano)
Ornithogalum candicans (Summer hyacinth)
Ornithogalum spp. (star-of-Bethlehem)
Ornithogalum umbellatum (common star-of-Bethlehem)
Ornithopus perpusillus (Bird's-foot)
Ornithopus spp.
Orobanche hederae (ivy broomrape)
Orobanche minor (Common Broomrape)
Orobanche spp. (Broomrapes)
Orthilia secunda (one-sided wintergreen)
Orthilia spp.
Orthoceras spp.
Orthoceras strictum (Birds mouth orchid)
Orthotrichum anomalum (Anomalous Bristle-moss)
Orthotrichum diaphanum (White-tipped Bristle-moss)
Orthotrichum pulchellum (Elegant Bristle-moss)
Orthotrichum spp. (Bristle mosses)
Osmanthus delavayi (Delavay osmanthus)
Osmanthus × fortunei (Fortune's Osmanthus)
Osmanthus fragrans (Sweet Osmanthus)
Osmanthus fragrans var. aurantiacus (Orange-Flowered Tea Olive)
Osmanthus heterophyllus (holly-leaved osmanthus)
Osmanthus heterophyllus 'Goshiki' (Goshiki holly-leaf osmanthus)
Osmanthus heterophyllus 'Variegatus' (Variegated holly osmanthus)
Osmanthus spp. (Sweet olives)
Osmanthus x burkwoodii (Burkwood osmanthus)
Osmorhiza berteroi (mountain sweet cicely)
Osmorhiza claytonii (hairy sweet cicely)
Osmorhiza longistylis (aniseroot)
Osmorhiza spp. (sweet cicely)
Osmunda claytoniana (interrupted fern)
Osmunda regalis (Royal Fern)
Osmunda regalis 'Purpurascens' (Purple Royal Fern)
Osmunda spectabilis (American Royal Fern)
Osmunda spp.
Osmundastrum cinnamomeum (Cinnamon Fern)
Osmundastrum spp.
Osmundea pinnatifida (Pepper Dulse)
Osmundea spp.
Osteospermum moniliferum (Bietou)
Ostrya spp.
Ostrya virginiana (American hophornbeam)
Oxalis acetosella (European wood-sorrel)
Oxalis articulata (pink-sorrel)
Oxalis corniculata (trailing yellow sorrel)
Oxalis debilis (Largeflower pink-sorrel)
Oxalis dillenii (slender yellow woodsorrel)
Oxalis exilis (least yellow-sorrel)
Oxalis incarnata (Pale pink-sorrel)
Oxalis montana (mountain woodsorrel)
Oxalis oregana (redwood sorrel)
Oxalis perennans (woody-root woodsorrel)
Oxalis pes-caprae (Bermuda buttercup)
Oxalis purpurea (Purple woodsorrel)
Oxalis smalliana (Redwood Sorrel)
Oxalis spp. (Woodsorrels)
Oxalis stricta (upright yellow woodsorrel)
Oxalis violacea (violet woodsorrel)
Oxybasis rubra (red pigweed)
Oxybasis spp.
Oxydendrum arboreum (sourwood)
Oxydendrum spp.
Oxylobium ellipticum (golden shaggy-pea)
Oxylobium spp.
Oxyrrhynchium hians (Swartz's Feather-moss)
Oxyrrhynchium spp.
Oxytropis lambertii (Lambert's Locoweed)
Oxytropis spp. (Locoweed)
Ozothamnus diosmifolius (Sago Flower)
Ozothamnus ferrugineus (Tree Everlasting)
Ozothamnus obcordatus (Grey Everlasting)
Ozothamnus spp.
Ozothamnus turbinatus (Coast Everlasting)
Pachira aquatica (Money Tree)
Pachira spp.
Pachyphragma macrophyllum (giant spring brassica)
Pachyphragma spp.
Pachysandra spp.
Pachysandra terminalis (Japanese spurge)
Pachysandra terminalis 'Variegata' (Variegated Japanese spurge)
Packera anonyma (Small's ragwort)
Packera aurea (golden ragwort)
Packera glabella (Butterweed)
Packera obovata (roundleaf ragwort)
Packera spp. (American groundsels and ragworts)
Paeonia 'Angel Cheeks' (Angel Cheeks Peony)
Paeonia 'Best Man' (Best Man Peony)
Paeonia 'Big Ben' (Big Ben Peony)
Paeonia 'Bowl of Beauty' (Bowl of Beauty Peony)
Paeonia 'Bowl of Cream' (Bowl of Cream Peony)
Paeonia 'Buckeye Belle'
Paeonia californica (California Peony)
Paeonia 'Coral Charm' (Coral Charm Peony)
Paeonia 'Cora Louise' (Cora Louise Itoh Peony)
Paeonia 'Coral Sunset' (Coral Sunset Peony)
Paeonia 'Felix Crousse' (Felix Crousse Peony)
Paeonia 'Kansas' (Kansas Peony)
Paeonia 'Krinkled White' (Krinkled White Peony)
Paeonia lactiflora (garden peony)
Paeonia lactiflora 'Alexander Fleming' (Alexander Fleming Peony)
Paeonia lactiflora 'Celebrity' (Celebrity Peony)
Paeonia lactiflora 'Duchesse de Nemours' (Duchesse de Nemours Peony)
Paeonia lactiflora 'Festiva Maxima' (Festiva Maxima Peony)
Paeonia lactiflora 'Gay Paree' (Gay Paree Peony)
Paeonia lactiflora 'Green Halo' (Green Halo Peony)
Paeonia lactiflora 'Jan van Leeuwen' (Jan van Leeuwen Peony)
Paeonia lactiflora 'Karl Rosenfeld' (Karl Rosenfeld Peony)
Paeonia lactiflora 'Pillow Talk' (Pillow Talk Peony)
Paeonia lactiflora 'Red Charm' (Red Charm Peony)
Paeonia lactiflora 'Sarah Bernhardt' (Sarah Bernhardt Peony)
Paeonia lactiflora 'Sorbet' (Sorbet Peony)
Paeonia lactiflora spp. (Bouquet Builders Peony Collection)
Paeonia lactiflora 'Sword Dance' (Sword Dance Peony)
Paeonia lactiflora 'White Wings'
Paeonia 'Lady Alexandra Duff' (Lady Alexandra Duff Peony)
Paeonia 'Madame Calot' (Madame Calot Peony)
Paeonia 'Madame de Verneville' (Madame de Verneville Peony)
Paeonia 'Many Happy Returns' (Many Happy Returns Peony)
Paeonia 'Miss America' (Miss America Peony)
Paeonia officinalis (common peony)
Paeonia 'Pink Hawaiian Coral' (Pink Hawaiian Coral Peony)
Paeonia 'Santa Fe' (Santa Fe Peony)
Paeonia 'Scarlet Heaven' (Scarlet Heaven Itoh Peony)
Paeonia spp. (Peonies)
Paeonia ssp. (tree peony)
Paeonia 'Watermelon Wine' (Watermelon Wine Itoh Peony)
Paeonia x 'Bartzella' (Bartzella Peony)
Palicourea spp.
Palmaria palmata (Dulse)
Palmaria spp.
Panax spp.
Panax trifolius (dwarf ginseng)
Pandanus spp. (screwpines)
Pandanus tectorius (thatch screwpine)
Pandorea jasminoides (Bower Plant)
Pandorea pandorana (wonga vine)
Pandorea spp.
Panicum amarum (Bitter Panicgrass)
Panicum capillare (witch grass)
Panicum spp. (panicgrasses)
Panicum virgatum (Switchgrass)
Papaver atlanticum (Atlas Poppy)
Papaver cambricum (welsh poppy)
Papaver dubium (Long-headed poppy)
Papaver orientale (Oriental poppy)
Papaver pilosum subsp. spicatum
Papaver rhoeas (common poppy)
Papaver rupifragum
Papaver somniferum (opium poppy)
Papaver spp. (Poppies)
Parahebe perfoliata (Koromiko)
Paraserianthes lophantha (Plume Albizia)
Paraserianthes spp.
Paratrophis pendulina (whalebone tree)
Paratrophis spp.
Parietaria judaica (pellitory-of-the-wall)
Parietaria pensylvanica (Pennsylvania pellitory)
Parietaria spp. (pellitories)
Paris polyphylla (multi-leaf paris)
Paris quadrifolia (herb paris)
Paris spp.
Parkinsonia aculeata (Mexican palo verde)
Parkinsonia florida (blue palo verde)
Parkinsonia microphylla (little-leaved palo verde)
Parkinsonia spp. (palo verde)
Parnassia palustris (marsh grass-of-Parnassus)
Parnassia spp.
Parrotia persica (Persian parrotia, ironwood)
Parrotia spp.
Parsonsia spp.
Parsonsia straminea (Common Silkpod)
Parthenium hysterophorus (Santa Maria feverfew)
Parthenium integrifolium (wild quinine)
Parthenium spp. (wild quinines)
Parthenocissus inserta (thicket creeper)
Parthenocissus quinquefolia (Virginia creeper)
Parthenocissus spp. (Virginia Creepers)
Parthenocissus tricuspidata (Boston ivy)
Paspalum dilatatum (Dallis grass)
Paspalum notatum (Bahia Grass)
Paspalum spp. (Paspalum)
Paspalum urvillei (Vasey Grass)
Passerina spp. (Gonnas)
Passiflora edulis (passion fruit)
Passiflora incarnata (purple passionflower)
Passiflora lutea (yellow passionflower)
Passiflora pallida (corkystem passionvine)
Passiflora spp. (Passionflowers)
Passiflora suberosa (corkystem passionflower)
Passiflora subpeltata (white passionflower)
Pastinaca spp.
Patersonia fragilis (Short Purple-flag)
Patersonia glabrata (Leafy Purple Flag)
Patersonia occidentalis (Purple Flag)
Patersonia sericea (Silky Purple Flag)
Patersonia spp.
Patrinia spp.
Paulownia spp.
Paulownia tomentosa (empress tree)
Pauridia spp.
Pauridia vaginata (yellow star)
Pavonia hastata (Spearleaf Swampmallow)
Pavonia lasiopetala (Rose pavonia)
Pavonia spp. (Swampmallows)
Paxistima myrsinites (Oregon Box)
Paxistima spp.
Pedicularis canadensis (Canadian lousewort)
Pedicularis densiflora (Warrior's Plume)
Pedicularis groenlandica (Elephant's-Head lousewort)
Pedicularis palustris (Marsh Lousewort)
Pedicularis racemosa (Sickletop Lousewort)
Pedicularis spp. (Louseworts)
Pedicularis sylvatica (Common Lousewort)
Pediocactus simpsonii (Mountain Ball Cactus)
Pediocactus spp.
Pediomelum spp.
Pediomelum tenuiflorum (Slimflower Scurfpea)
Pelargonium australe (Austral Stork's-bill)
Pelargonium capitatum (rose-scented geranium)
Pelargonium × domesticum (regal pelargonium)
Pelargonium × hybridum (garden geranium)
Pelargonium rodneyanum (magenta stork's-bill)
Pelazoneuron kunthii (Widespread Maiden Fern)
Pelazoneuron spp.
Pellaea andromedifolia (Coffee Fern)
Pellaea atropurpurea (purple-stem cliffbrake)
Pellaea falcata (Sickle Fern)
Pellaea mucronata (bird's foot cliffbrake)
Pellaea rotundifolia (Button Fern)
Pellaea spp.
Pellia epiphylla (common pellia)
Pellia spp. (Pellia)
Peltandra spp.
Peltandra virginica (Green Arrow Arum)
Pennisetum alopecuroides (Fountain Grass)
Pennisetum spp.
Penstemon barrettiae (Barrett's Penstemon)
Penstemon cardwellii (Cardwell's Penstemon)
Penstemon centranthifolius (scarlet bugler)
Penstemon cobaea (cobaea beardtongue)
Penstemon davidsonii (Davidson's Penstemon)
Penstemon digitalis (foxglove beardtongue)
Penstemon digitalis 'Husker Red' (Husker Red Penstemon)
Penstemon eatonii (Firecracker Penstemon)
Penstemon fruticosus (Shrubby Penstemon)
Penstemon heterophyllus (Bunchleaf Penstemon)
Penstemon Hybrids (Beard Tongue)
Penstemon newberryi (Mountain Pride)
Penstemon ovatus (Broad-leafed Penstemon)
Penstemon pallidus (Pale Beardtongue)
Penstemon palmeri (Palmer's penstemon)
Penstemon procerus (Small-flowered Penstemon)
Penstemon pruinosus (Chelan Penstemon)
Penstemon rattanii (Rattan's Penstemon)
Penstemon 'Raven' (Raven Penstemon)
Penstemon richardsonii (Richardson's Penstemon)
Penstemon serrulatus (Coast Penstemon)
Penstemon smallii (Smalls Beardtongue)
Penstemon spectabilis (Showy Penstemon)
Penstemon spp. (beardtongues)
Penstemon strictus (Rocky Mt Penstemon)
Penstemon venustus (Blue Mt Penstemon)
Penstemon virens (Front Range Beardtongue)
Penstemon whippleanus (Whipple's penstemon)
Pentaglottis sempervirens (Green Alkanet)
Pentaglottis spp.
Pentagramma spp.
Pentagramma triangularis (goldback fern)
Pentanema spp.
Pentanema squarrosum (Ploughman's-spikenard)
Pentas lanceolata (Egyptian Star-cluster)
Pentas spp.
Penthorum sedoides (ditch stonecrop)
Penthorum spp.
Peperomia argyreia (Watermelon Peperomia)
Peperomia caperata 'Rosso' (Rosso Peperomia)
Peperomia leptostachya (Slender Peperomia)
Peperomia obtusifolia (Baby Rubber Plant)
Peperomia prostrata (String of Turtles)
Peperomia spp. (radiator plants)
Pericallis × hybrida (Florist's cineraria)
Pericallis spp.
Perilla frutescens (beefsteak plant)
Perilla spp.
Perityle emoryi (Emory's rockdaisy)
Perityle spp.
Perovskia atriplicifolia 'Lacey Blue' (Lacey Blue Russian Sage)
Perovskia atriplicifolia 'Little Spire' (Little Spire Russian Sage)
Perovskia 'Filigran' (Filigran Russian Sage)
Perovskia 'Longin' (Longin Russian Sage)
Perovskia spp.
Persea spp.
Persicaria amphibia (water smartweed)
Persicaria amplexicaulis 'Firetail' (Red knotweed)
Persicaria decipiens (slender knotweed)
Persicaria hydropiper (waterpepper)
Persicaria hydropiperoides (swamp smartweed)
Persicaria lapathifolia (dock-leaved smartweed)
Persicaria longiseta (low smartweed)
Persicaria microcephala 'Red Dragon' (Red Dragon Knotweed)
Persicaria pensylvanica (pinkweed)
Persicaria perfoliata (mile-a-minute weed)
Persicaria punctata (Dotted Smartweed)
Persicaria sagittata (arrow-leaved tearthumb)
Persicaria spp. (knotweeds, smartweeds, and waterpeppers)
Persoonia juniperina (Prickly Geebung)
Persoonia lanceolata (Lance-leaf Geebung)
Persoonia levis (Broad-leaf Geebung)
Persoonia linearis (Narrow-leaf Geebung)
Persoonia pinifolia (Pine-leaf Geebung)
Persoonia spp.
Persoonia virgata (small-leaved geebung)
Petalostigma pubescens (quinine bush)
Petalostigma spp.
Petasites albus (White Butterbur)
Petasites frigidus (coltsfoot)
Petasites hybridus (Common Butterbur)
Petasites japonicus (fuki,butterburr)
Petasites pyrenaicus (Winter Heliotrope)
Petasites spp. (Butterburs)
Petrophile pulchella (Conesticks)
Petrophile spp.
Petrosedum rupestre (Reflexed Stonecrop)
Petrosedum spp.
Petroselinum spp.
Petunia × atkinsiana (garden petunia)
Peucedanum spp.
Peucedanum verticillare
Phacelia bipinnatifida (Purple Phacelia)
Phacelia californica (California phacelia)
Phacelia campanularia (desert bluebells)
Phacelia cicutaria (caterpillar scorpionweed)
Phacelia congesta (Blue Curls)
Phacelia crenulata (Notch-leaf Scorpionweed)
Phacelia distans (distant phacelia)
Phacelia hastata (Silverleaf phacelia)
Phacelia imbricata (Mountain Phacelia)
Phacelia minor (wild canterbury bells)
Phacelia nemoralis (Shade Phacelia)
Phacelia parryi (Parry's phacelia)
Phacelia purshii (Miami Mist)
Phacelia ramosissima (branching phacelia)
Phacelia sericea (Silky Phacelia)
Phacelia spp. (Scorpionweeds)
Phacelia tanacetifolia (Lacy phacelia)
Phalaenopsis spp. (Moth Orchid)
Phalaris aquatica (harding grass)
Phalaris arundinacea (reed canary grass)
Phalaris spp. (Canarygrasses)
Phaseolus spp. (beans)
Phaseolus vulgaris 'Blue Lake' (Blue Lake Green Bean)
Phaseolus vulgaris 'Kentucky Wonder' (Kentucky Wonder Bean)
Phaseolus vulgaris 'Provider' (Provider Bush Bean)
Phebalium spp.
Phebalium squamulosum (scaly phebalium)
Phedimus kamtschaticus (Orange Stonecrop)
Phedimus selskianus (Selsky Stonecrop)
Phedimus spp. (False Stonecrops)
Phegopteris connectilis (long beech fern)
Phegopteris decursive-pinnata (Japanese Beech Fern)
Phegopteris hexagonoptera (broad beech fern)
Phegopteris spp.
Pheladenia deformis (Blue Fairy Orchid)
Pheladenia spp.
Phelipanche spp.
Phellodendron spp.
Philadelphus (mock oranges)
Philadelphus coronarius 'Aureus' (Golden Mock Orange)
Philadelphus lewisii (Lewis' Mock Orange)
Philadelphus 'Snowbelle' (Snowbelle Mock Orange)
Philadelphus spp. (mock orange)
Philodendron erubescens 'Pink Princess' (Pink Princess Philodendron)
Philodendron gloriosum (Glorious Philodendron)
Philodendron hastatum (Silver Sword Philodendron)
Philodendron hederaceum (Heartleaf Philodendron)
Philodendron 'Moonlight' (Moonlight Philodendron)
Philodendron 'Prince of Orange' (Prince of Orange Philodendron)
Philodendron 'Rojo Congo' (Rojo Congo Philodendron)
Philodendron rugosum (Philodendron Pig Skin)
Philodendron spp. (philodendrons)
Philydrum lanuginosum (woolly frog's-mouth)
Philydrum spp.
Phlebodium aureum (Blue Star Fern)
Phlebodium spp.
Phleum pratense (Timothy grass)
Phleum spp. (Timothies)
Phlomis italica
Phlomis russeliana (Jerusalem sage)
Phlomis spp. (Lampwicks)
Phlox diffusa (spreading phlox)
Phlox divaricata (Woodland Phlox)
Phlox divaricata 'Blue Moon' (Blue Moon Woodland Phlox)
Phlox divaricata 'May Breeze' (May Breeze Woodland Phlox)
Phlox drummondii (Drummond's phlox)
Phlox hoodii (spiny phlox)
Phlox longifolia (Longleaf Phlox)
Phlox paniculata (Garden Phlox)
Phlox paniculata 'Blue Paradise'
Phlox paniculata spp. (Tall Phlox Mix)
Phlox pilosa (prairie phlox)
Phlox spp. (phloxes)
Phlox subulata 'Amazing Grace' (Amazing Grace Creeping Phlox)
Phlox subulata 'Candy Stripe' (Candy Stripe Creeping Phlox)
Phlox subulata 'Emerald Blue' (Emerald Blue Creeping Phlox)
Phlox subulata 'Emerald Pink' (Emerald Pink Creeping Phlox)
Phlox subulata 'Fort Hill' (Fort Hill Creeping Phlox)
Phlox subulata 'Purple Beauty' (Purple Beauty Creeping Phlox)
Phlox subulata 'Scarlet Flame' (Scarlet Flame Carpet Phlox)
Phlox subulata 'Snowflake' (Snowflake Creeping Phlox)
Phoenix canariensis (Canary Island palm)
Phoenix roebelenii (Pygmy Date Palm)
Phoenix spp. (date palms)
Phoenix sylvestris (Silver Date Palm)
Pholistoma auritum (Fiesta Flower)
Pholistoma spp.
Phoradendron californicum (Mesquite Mistletoe)
Phoradendron leucarpum (American Mistletoe)
Phoradendron spp. (leafy mistletoes)
Phormium spp. (New Zealand flaxes)
Photinia davidiana (tall stranvaesia)
Photinia × fraseri (Red Tip Photinia)
Photinia serratifolia (Chinese Photinia)
Photinia spp. (Christmas berries)
Photinia x fraseri (Red tip photinia)
Phragmites australis (common reed)
Phragmites spp.
Phryma leptostachya (American lopseed)
Phryma spp.
Phygelius spp.
Phygelius x rectus (Cape Fuchsia)
Phygelius x rectus Hybrids (cape fuchsia)
Phyla lanceolata (lanceleaf frogfruit)
Phyla nodiflora (turkey tangle frogfruit)
Phyla spp. (frogfruits)
Phylica spp. (Hardleaves)
Phyllanthus calycinus (False Boronia)
Phyllanthus hirtellus (Thyme Spurge)
Phyllanthus spp.
Phyllanthus urinaria (Chamberbitter)
Phyllodoce empetriformis (pink mountainheath)
Phyllodoce spp.
Phyllospadix spp. (surfgrasses)
Phyllospadix torreyi (Torrey's Surfgrass)
Phyllostachys aurea (golden bamboo)
Phyllostachys nigra (black bamboo)
Phyllostachys spp.
Phyllota phylicoides (Common Phyllota)
Phyllota pleurandroides (Heathy Phyllota)
Phyllota spp.
Physalis angulata (cutleaf groundcherry)
Physalis crassifolia (Thickleaf Groundcherry)
Physalis × elliottii
Physalis heterophylla (clammy groundcherry)
Physalis longifolia (long-leaved groundcherry)
Physalis spp. (groundcherries)
Physaria spp. (bladderpods)
Physocarpus capitatus (Pacific ninebark)
Physocarpus opulifolius 'Diabolo' (Diabolo Ninebark)
Physocarpus opulifolius 'Monlo' (Diabolo® ninebark)
Physocarpus opulifolius 'Seward' (Summer Wine Ninebark)
Physocarpus spp. (ninebarks)
Physostegia spp. (dragonheads and obedient plants)
Physostegia virginiana (Obedient Plant)
Phyteuma scheuchzeri (Oxford Rampion)
Phyteuma spp.
Phytolacca americana (American pokeweed)
Phytolacca octandra (Inkweed)
Phytolacca spp. (Pokeweeds)
Picea abies (Norway Spruce)
Picea abies 'Little Gem' (Little Gem Norway Spruce)
Picea abies 'Nidiformis' (bird's nest spruce)
Picea abies 'Pendula' (Weeping Norway Spruce)
Picea abies 'Pusch' (Pusch Norway Spruce)
Picea abies 'Reflexa' (weeping Norway spruce)
Picea × albertiana (Interior Spruce)
Picea engelmannii (Engelmann spruce)
Picea glauca (white spruce)
Picea glauca 'Conica' (Dwarf Alberta Spruce)
Picea glauca 'Pendula' (Weeping White Spruce)
Picea mariana (black spruce)
Picea meyeri (Meyer Spruce)
Picea omorika (Serbian Spruce)
Picea orientalis (Oriental spruce)
Picea orientalis 'Aurea' (Golden Oriental Spruce)
Picea orientalis 'Aureospicata' (Golden Oriental Spruce)
Picea pungens (Colorado Spruce)
Picea pungens 'Glauca' (Colorado Blue Spruce)
Picea pungens 'Montgomery' (Montgomery Blue Spruce)
Picea rubens (red spruce)
Picea sitchensis (Sitka Spruce)
Picea spp. (spruces)
Picris hieracioides (Hawkweed Oxtongue)
Picris spp.
Pieris 'Brouwer's Beauty' (Brouwer's Beauty Pieris)
Pieris japonica 'Cavatine' (Cavatine Japanese Pieris)
Pieris japonica 'Dorothy Wyckoff' (Dorothy Wyckoff Pieris)
Pieris japonica 'Flamingo' (Flamingo Japanese Pieris)
Pieris japonica 'Flaming Silver' (Flaming Silver Pieris)
Pieris japonica 'Forest Flame' (Japanese andromeda)
Pieris japonica 'Little Heath' (Little Heath Pieris)
Pieris japonica 'Mountain Fire' (Pieris Mountain Fire)
Pieris japonica 'Nocturne' (Nocturne Japanese Pieris)
Pieris japonica 'Sarabande' (Sarabande Japanese Pieris)
Pieris japonica 'Valley Rose' (Valley Rose Pieris)
Pieris japonica 'Valley Valentine' (Valley Valentine Pieris)
Pieris japonica 'Variegata' (Variegated Japanese Pieris)
Pieris spp.
Pigea monopetala (Lady's Slipper)
Pigea spp.
Pigea stellarioides (spade flower)
Pilea matsudae
Pilea microphylla (Artillery Plant)
Pilea peperomioides (Pilea Peperomioides)
Pilea pumila (Canada clearweed)
Pilea spp. (Clearweeds)
Pilosella aurantiaca (orange hawkweed)
Pilosella caespitosa (meadow hawkweed)
Pilosella officinarum (mouse-eared hawkweed)
Pilosella spp. (mouse-ear hawkweeds)
Pimelea curviflora (curved rice-flower)
Pimelea glauca (smooth riceflower)
Pimelea humilis (Common Rice-flower)
Pimelea linifolia (Queen of the Bush)
Pimelea octophylla (Woolly Rice-flower)
Pimelea prostrata
Pimelea spp. (riceflowers)
Pimpinella saxifraga (Burnet-saxifrage)
Pimpinella spp.
Pinguicula spp.
Pinguicula vulgaris (Common Butterwort)
Pinus aristata (Bristlecone Pine)
Pinus brachyptera (Southwestern Ponderosa Pine)
Pinus bungeana (Lacebark Pine)
Pinus cembra (Swiss stone pine)
Pinus clausa (sand pine)
Pinus contorta 'Taylor's Sunburst' (Taylor's Sunburst Lodgepole Pine)
Pinus contorta var. contorta (Shore Pine)
Pinus contorta var. latifolia (Lodgepole Pine)
Pinus densiflora (Japanese Red Pine)
Pinus densiflora 'Umbraculifera' (Japanese Umbrella Pine)
Pinus echinata (shortleaf pine)
Pinus edulis (Colorado Pinyon)
Pinus elliottii (slash pine)
Pinus flexilis (limber pine)
Pinus jeffreyi (Jeffrey Pine)
Pinus × kohae (Arizona Singleleaf Pinyon)
Pinus longaeva (Great Basin bristlecone pine)
Pinus monophylla (singleleaf pinyon)
Pinus monticola (Western White Pine)
Pinus mugo (mugo pine)
Pinus mugo 'Slowmound' (Dwarf Mugo Pine)
Pinus nigra (Austrian Pine)
Pinus palustris (longleaf pine)
Pinus parviflora (Japanese White Pine)
Pinus parviflora 'Glauca' (Blue Japanese White Pine)
Pinus ponderosa (Ponderosa Pine)
Pinus scopulorum (Rocky Mountains Ponderosa Pine)
Pinus spp. (pines)
Pinus strobus (eastern white pine)
Pinus strobus 'Nana' (Dwarf White Pine)
Pinus sylvestris (Scots Pine)
Pinus sylvestris 'Fastigiata' (Columnar Scots Pine)
Pinus sylvestris 'Watereri' (Waterer Scots Pine)
Pinus taeda (Loblolly Pine)
Pinus thunbergii (Japanese Black Pine)
Pinus thunbergii 'Thunderhead' (Thunderhead Japanese black pine)
Pinus torreyana (Torrey pine)
Pinus wallichiana (Himalayan Pine)
Piper hederaceum (Australian Pepper Vine)
Piper nigrum (Black Pepper Plant)
Piper spp. (pepper plants)
Pistacia chinensis (Chinese pistache)
Pistacia lentiscus (mastic)
Pistacia spp. (pistaches)
Pistia spp.
Pistia stratiotes (Water Lettuce)
Pisum spp.
Pithecellobium spp. (Blackbeads)
Pittosporum angustifolium (Native apricot)
Pittosporum bicolor (Banyalla)
Pittosporum multiflorum (orange thorn)
Pittosporum revolutum (Rough-fruited Pittosporum)
Pittosporum spp. (Cheesewoods)
Pittosporum tenuifolium (pittosporum tenuifolium)
Pittosporum tobira (Japanese pittosporum)
Pittosporum undulatum (Australian Cheesewood)
Pityopsis spp. (Silkgrasses)
Plagiobothrys nothofulvus (Rusty Popcornflower)
Plagiobothrys spp. (Popcornflowers)
Plagiochila spp.
Plagiomnium cuspidatum (Woodsy Thyme-moss)
Plagiomnium spp. (Thyme and Allied Mosses)
Plagiomnium undulatum (Palm-tree Moss)
Plagiothecium spp.
Plagiothecium undulatum (Waved Silk-moss)
Plantago aristata (bracted plantain)
Plantago coronopus (Buck's-horn Plantain)
Plantago erecta (dot-seed plantain)
Plantago lanceolata (English plantain)
Plantago major (common plantain)
Plantago maritima (Sea Plantain)
Plantago media (Hoary Plantain)
Plantago patagonica
Plantago rhodosperma (redseed plantain)
Plantago rugelii (American plantain)
Plantago spp. (plantains)
Plantago virginica (dwarf plantain)
Platanthera chlorantha (Greater butterfly-orchid)
Platanthera dilatata (white bog orchid)
Platanthera spp. (Bog Orchids)
Platanus × acerifolia (London plane tree)
Platanus × hispanica (London Plane)
Platanus occidentalis (American Sycamore)
Platanus orientalis (Oriental Plane)
Platanus racemosa (California Sycamore)
Platanus spp. (planes)
Platanus wrightii (Arizona sycamore)
Platycerium bifurcatum (Staghorn Fern)
Platycerium spp. (staghorn ferns)
Platycerium superbum (Stag Horn Fern)
Platycladus orientalis (Oriental Arborvitae)
Platycladus orientalis 'Aurea Nana' (Berckmans Gold Arborvitae)
Platycladus spp.
Platycodon spp.
Platylobium formosum (Handsome Flat Pea)
Platylobium obtusangulum (Common Flat-pea)
Platylobium spp.
Platysace lanceolata (Shrubby Platysace)
Platysace linearifolia (Carrot Tops)
Platysace spp.
Platystemon californicus (creamcups)
Platystemon spp.
Plectocephalus americanus (American basketflower)
Plectocephalus spp.
Plectranthus spp. (spurflowers)
Plectritis congesta (shortspur seablush)
Plectritis spp.
Pleioblastus pygmaeus (dwarf bamboo)
Pleioblastus spp.
Plenogemma phyllantha (Frizzled Pincushion)
Plenogemma spp.
Pleopeltis michauxiana (resurrection fern)
Pleopeltis spp.
Pleroma spp. (glory bushes and allies)
Pleurothallis spp.
Pleurozium schreberi (Red-stemmed Feather Moss)
Pleurozium spp.
Pluchea baccharis (Rosy Camphorweed)
Pluchea camphorata (Camphor-weed)
Pluchea odorata (marsh fleabane)
Pluchea sericea (arrowweed)
Pluchea spp. (marsh fleabanes)
Plumbago spp. (plumbagos)
Plumeria rubra (Plumeria)
Plumeria spp. (Frangipani Trees)
Poa annua (annual bluegrass)
Poa bulbosa (Bulbous Bluegrass)
Poa labillardierei (common tussock grass)
Poa pratensis (Kentucky Bluegrass)
Poa spp. (Meadow-grasses)
Poa trivialis (Rough Meadow-grass)
Podocarpus elatus (Plum Pine)
Podocarpus lawrencei (Mountain Plum Pine)
Podocarpus macrophyllus (Buddhist pine)
Podocarpus nivalis (Snow Totara)
Podocarpus spp. (plum pines)
Podolobium ilicifolium (Prickly Shaggy Pea)
Podolobium spp.
Podophyllum peltatum (mayapple)
Podophyllum pleianthum (Chinese mayapple)
Podophyllum 'Spotty Dotty' (Spotty Dotty mayapple)
Podophyllum spp.
Podosphaera spp.
Podosphaera xanthii (Cucurbit Powdery Mildew)
Pogonia ophioglossoides (Rose Pogonia)
Pogonia spp.
Polanisia dodecandra (redwhisker clammyweed)
Polanisia spp.
Polemonium caeruleum 'Snow and Sapphires' (Snow and Sapphires Jacob's Ladder)
Polemonium reptans (Jacob's ladder)
Polemonium spp. (Jacob's ladders)
Polycarpon spp.
Polycarpon tetraphyllum (fourleaf manyseed)
Polygala myrtifolia (Sweet Pea Shrub)
Polygala serpyllifolia (Heath Milkwort)
Polygala spp. (Milkworts)
Polygala vulgaris (Common Milkwort)
Polygaloides paucifolia (fringed polygala)
Polygaloides spp.
Polygonatum (Solomon's seal)
Polygonatum biflorum (Solomons Seal)
Polygonatum multiflorum (Solomon's-seal)
Polygonatum odoratum (Solomon's Seal)
Polygonatum odoratum 'Variegatum' (Variegated Solomon's Seal)
Polygonatum pubescens (hairy Solomon's-seal)
Polygonatum verticillatum
Polygonatum x hybridum
Polygonum arenastrum (Oval Leaf Knotweed)
Polygonum aviculare (common knotweed)
Polygonum spp. (knotweeds)
Polylepis spp. (queñua and allies)
Polymeria calycina (slender bindweed)
Polymeria spp.
Polymnia canadensis (leafcup)
Polymnia spp.
Polypodium californicum (California Polypody)
Polypodium glycyrrhiza (licorice fern)
Polypodium interjectum (intermediate polypody)
Polypodium scouleri (Scouler's Polypody)
Polypodium spp. (polypody ferns)
Polypodium virginianum (rock polypody)
Polypodium vulgare (common polypody)
Polypogon monspeliensis (rabbitfoot grass)
Polypogon spp.
Polypogon viridis (water beard grass)
Polypremum procumbens (Rust Weed)
Polypremum spp.
Polyscias elegans (celery wood)
Polyscias sambucifolia (Elderberry Panax)
Polyscias spp.
Polystichum acrostichoides (Christmas Fern)
Polystichum aculeatum (hard shield fern)
Polystichum munitum (Western sword fern)
Polystichum polyblepharum (Korean tassel fern)
Polystichum proliferum (mother shield-fern)
Polystichum setiferum (soft shield fern)
Polystichum setiferum 'Herrenhausen'
Polystichum spp. (shield ferns)
Polytaenia spp.
Polytaenia texana (Texas Prairie Parsley)
Polytrichum commune (Common Haircap Moss)
Polytrichum formosum (Bank Haircap Moss)
Polytrichum juniperinum (juniper haircap moss)
Polytrichum piliferum (bristly haircap moss)
Polytrichum spp. (haircap mosses)
Pomaderris apetala (Tainui)
Pomaderris aspera (Hazel Pomaderris)
Pomaderris spp.
Pomax spp.
Pomax umbellata (pomax)
Pontederia cordata (pickerelweed)
Pontederia crassipes (common water hyacinth)
Pontederia spp. (Pickerel Weeds)
Populus × acuminata (lanceleaf cottonwood)
Populus alba (white poplar)
Populus angustifolia (Narrowleaf Cottonwood)
Populus balsamifera ssp. trichocarpa (black cottonwood)
Populus deltoides (Eastern Cottonwood)
Populus fremontii (Frémont Cottonwood)
Populus grandidentata (bigtooth aspen)
Populus nigra 'Italica' (Lombardy poplar)
Populus × rouleauana (Rouleau's Poplar)
Populus spp. (poplars, cottonwoods, and aspens)
Populus tremula (European aspen)
Populus tremuloides (quaking aspen)
Populus trichocarpa (cottonwood)
Poranthera microphylla (Small Poranthera)
Poranthera spp.
Porella spp.
Portulaca oleracea (purslane)
Portulaca pilosa (shaggy portulaca)
Portulacaria afra (Jade Plant)
Portulacaria spp. (Spekbooms)
Portulaca spp. (purslanes)
Posidonia australis (fibre-ball weed)
Posidonia spp.
Potamogeton natans (floating-leaved pondweed)
Potamogeton polygonifolius (Bog Pondweed)
Potamogeton spp. (Pondweeds)
Potentilla anglica (English cinquefoil)
Potentilla anserina (Pacific Silverweed)
Potentilla argentea (Silvery Cinquefoil)
Potentilla atrosanguinea (red cinquefoil)
Potentilla canadensis (dwarf cinquefoil)
Potentilla erecta (Tormentil)
Potentilla fruticosa (Shrubby Cinquefoil)
Potentilla gelida (silvery cinquefoil)
Potentilla gracilis (Slender Cinquefoil)
Potentilla indica (mock strawberry)
Potentilla nepalensis 'Miss Willmott'
Potentilla norvegica (rough cinquefoil)
Potentilla palustris
Potentilla recta (sulfur cinquefoil)
Potentilla recta var. sulphurea
Potentilla reptans (Creeping cinquefoil)
Potentilla simplex (common cinquefoil)
Potentilla spp. (cinquefoils)
Potentilla sterilis (Barren Strawberry)
Pothos longipes (candle vine)
Pothos spp.
Prasophyllum elatum (Tall Leek Orchid)
Prasophyllum spp.
Pratia pedunculata (Blue Star Creeper)
Pratia spp.
Praxelis clematidea (pussyfoot)
Praxelis spp.
Primula (polyanthus)
Primula acaulis (stemless primrose)
Primula clevelandii (Padre's Shooting Star)
Primula hendersonii (Henderson's shooting star)
Primula kisoana (Kisan primrose)
Primula meadia (eastern shooting star)
Primula pauciflora (dark-throated shooting star)
Primula pulverulenta
Primula sieboldii (sakura)
Primula veris (Cowslip)
Prosartes hookeri (Hooker's Fairy Bells)
Prosartes smithii (Largeflower Fairybells)
Prosartes spp. (American fairybells)
Prostanthera cuneata (alpine mint bush)
Prostanthera lasianthos (Christmas Bush)
Prostanthera spp.
Protea × hybrida (Sugarbush Hybrids)
Protea spp.
Prunella spp. (selfheals)
Prunella vulgaris (self heal)
Prunus americana (American plum)
Prunus angustifolia (Chickasaw plum)
Prunus armeniaca 'Moorpark' (Moorpark Apricot)
Prunus caroliniana (Carolina laurelcherry)
Prunus cerasifera (purple leaf plum, cherry plum)
Prunus cerasifera 'Thundercloud' (Thundercloud Plum)
Prunus cerasus 'Montmorency' (Montmorency Cherry)
Prunus cerasus 'North Star' (North Star Cherry)
Prunus × cistena (Purple-leaved Sand Cherry)
Prunus domestica (European plum)
Prunus emarginata (Bitter Cherry)
Prunus ilicifolia (hollyleaf cherry)
Prunus insititia (Damson)
Prunus 'Kanzan' (Kwanzan flowering cherry)
Prunus laurocerasus (English laurel)
Prunus laurocerasus 'Mt. Vernon' (Mt. Vernon laurel)
Prunus laurocerasus 'Otto Luyken' (Otto Luyken Laurel)
Prunus laurocerasus 'Schipkaensis' (Skip Laurel)
Prunus laurocerasus 'Zabeliana' (Zabel laurel)
Prunus lusitanica (Portuguese laurel)
Prunus maritima (Beach Plum)
Prunus mexicana (Mexican Plum)
Prunus padus (bird cherry)
Prunus pensylvanica (fire cherry)
Prunus salicina 'Satsuma' (Satsuma Plum)
Prunus serotina (Black Cherry)
Prunus serrulata ((in the Sato-Zakura group))
Prunus 'Shirotae' (Mt. Fuji flowering cherry)
Prunus spinosa (Blackthorn)
Prunus spp. (plums, cherries, and allies)
Prunus subhirtella 'Autumnalis' (Autumn Cherry Tree)
Prunus subhirtella 'Pendula' (weeping flowering cherry)
Prunus subhirtella 'Pendula Plena Rosea' (Double Pink Weeping Cherry Tree)
Prunus virginiana (Chokecherry)
Prunus × yedoensis (Yoshino flowering cherry)
Psephellus spp.
Pseudanomodon attenuatus (tree-skirt moss)
Pseudanomodon spp.
Pseuderanthemum spp.
Pseuderanthemum variabile (Pastel Flower)
Pseudisothecium myosuroides (Mouse-tail Moss)
Pseudisothecium spp.
Pseudisothecium stoloniferum (Cat's Tail Moss)
Pseudodictamnus mediterraneus
Pseudodictamnus spp.
Pseudofumaria lutea (Yellow Fumitory)
Pseudofumaria spp.
Pseudognaphalium biolettii (two-color rabbit tobacco)
Pseudognaphalium californicum (California cudweed)
Pseudognaphalium luteoalbum (Jersey Cudweed)
Pseudognaphalium obtusifolium (sweet everlasting)
Pseudognaphalium spp. (rabbit-tobaccos)
Pseudognaphalium stramineum (cottonbatting plant)
Pseudogynoxys chenopodioides (Mexican Flame Vine)
Pseudogynoxys spp.
Pseudolarix spp.
Pseudosasa japonica (Arrow Bamboo)
Pseudosasa spp.
Pseudoscleropodium purum (Neat Feather-moss)
Pseudoscleropodium spp.
Pseudotrillium rivale (brook wakerobin)
Pseudotrillium spp.
Pseudotsuga menziesii (Douglas fir)
Pseudotsuga menziesii 'Graceful Grace' (Graceful Grace Douglas Fir)
Pseudotsuga menziesii 'Pendula' (weeping Douglas fir)
Pseudotsuga menziesii var. glauca (Rocky Mountain Douglas fir)
Pseudotsuga spp. (Douglas-firs)
Psidium guajava (White Guava)
Psidium spp. (guavas)
Psilotum nudum (skeleton fork fern)
Psilotum spp.
Psorodendron schottii (indigo-bush)
Psorodendron spinosum (Smoketree)
Psorodendron spp.
Psychotria loniceroides (Hairy Psychotria)
Psychotria nervosa (Shiny-leaved Wild Coffee)
Psychotria spp. (wild coffees)
Psydrax odoratus (Lamboto)
Psydrax spp.
Ptelea spp.
Ptelea trifoliata (common hoptree)
Pteridium aquilinum (bracken fern)
Pteridium esculentum (Austral Bracken)
Pteridium spp. (brackens)
Pteris spp. (brakes)
Pteris tremula (Shaking Brake)
Pterocarya fraxinifolia (Caucasian Wingnut)
Pterocaulon pycnostachyum (blackroot)
Pterocaulon spp.
Pterospora andromedea (woodland pinedrops)
Pterospora spp.
Pterostylis alpina (Australian mountain greenhood)
Pterostylis concinna (Trim Greenhood)
Pterostylis curta (blunt greenhood)
Pterostylis grandiflora (cobra greenhood)
Pterostylis melagramma (tall greenhood)
Pterostylis nana (dwarf greenhood)
Pterostylis nutans (Nodding Greenhood)
Pterostylis parviflora (tiny greenhood)
Pterostylis pedunculata (maroonhood)
Pterostylis recurva (jug orchid)
Pterostylis sanguinea (Red-banded Greenhood)
Pterostylis spp. (Greenhoods)
Pterostylis vittata (Banded Greenhood)
Pterostyrax spp.
Ptilimnium capillaceum (herbwilliam)
Ptilimnium spp.
Ptilotus exaltatus (Pink Mulla Mulla)
Ptilotus obovatus (cotton bush)
Ptilotus polystachyus (Prince of Wales Feather)
Ptilotus spp.
Ptychomnion aciculare (pipe-cleaner moss)
Ptychomnion spp.
Ptychostomum capillare (Capillary Thread-moss)
Ptychostomum spp.
Pueraria montana (kudzu)
Pueraria spp.
Pulicaria dysenterica (Common Fleabane)
Pulicaria spp.
Pullenia gunnii (slender tick-trefoil)
Pullenia spp.
Pulmonaria (lungwort)
Pulmonaria obscura (Suffolk Lungwort)
Pulmonaria officinalis (Lungwort)
Pulmonaria × 'Trevi Fountain' (Trevi Fountain Lungwort)
Pulsatilla nuttalliana (prairie pasqueflower)
Pulsatilla occidentalis (Western pasqueflower)
Pulsatilla patens (Eastern Pasque Flower)
Pulsatilla spp. (pasqueflowers)
Pulsatilla vulgaris (common pasqueflower)
Pultenaea daphnoides (Large-leaf Bush Pea)
Pultenaea gunnii (golden bush-pea)
Pultenaea juniperina (prickly beauty)
Pultenaea pedunculata (matted bush-pea)
Pultenaea retusa (Notched Bush-pea)
Pultenaea scabra (Rough Bush-pea)
Pultenaea spp. (Bush-peas)
Pultenaea tuberculata (Wreath Bush-pea)
Pultenaea villosa (Hairy Bush-pea)
Pulvigera spp.
Purshia spp.
Purshia stansburyana (Stansbury's Cliffrose)
Purshia tridentata (Antelope Bitterbrush)
Puschkinia spp.
Puya spp.
Pycnanthemum muticum (Short-Toothed Mountain Mint)
Pycnanthemum pilosum (Hairy Mountain Mint)
Pycnanthemum spp. (mountain mints)
Pycnanthemum tenuifolium (narrowleaf mountainmint)
Pycnanthemum virginianum (Virginia Mountain Mint)
Pyracantha (firethorns)
Pyracantha coccinea (Scarlet Firethorn)
Pyracantha spp. (firethorn pyracantha)
Pyrola americana (American wintergreen)
Pyrola asarifolia (bog wintergreen)
Pyrola elliptica (shinleaf)
Pyrola picta (white-veined wintergreen)
Pyrola spp. (wintergreens)
Pyrorchis nigricans (Red Beaks)
Pyrorchis spp.
Pyrrhopappus carolinianus (Carolina desert-chicory)
Pyrrhopappus pauciflorus (smallflower desert-chicory)
Pyrrhopappus spp. (desert-chicories)
Pyrrosia rupestris (Rock Felt Fern)
Pyrrosia spp. (Felt Ferns)
Pyrus calleryana (Callery flowering pear)
Pyrus salicifolia 'Pendula' (Weeping Silver Pear)
Quercus × acutidens (Torrey's Hybrid Oak)
Quercus agrifolia (Coast Live Oak)
Quercus alba (White Oak)
Quercus × alvordiana (Alvord Oak)
Quercus berberidifolia (California scrub oak)
Quercus bicolor (Swamp White Oak)
Quercus buckleyi (Buckley's oak)
Quercus cerris (Turkey Oak)
Quercus coccinea (scarlet oak)
Quercus douglasii (blue oak)
Quercus durata (Leather Oak)
Quercus × eplingii (Epling's Oak)
Quercus × ewanii (Ewan's Oak)
Quercus falcata (Southern Red Oak Tree)
Quercus frainetto (Hungarian oak)
Quercus fusiformis (Texas live oak)
Quercus gambelii (Gambel Oak)
Quercus × ganderi (Gander oak)
Quercus garryana (Oregon white oak, Garry oak)
Quercus geminata (sand live oak)
Quercus hemisphaerica (Darlington Oak)
Quercus ilex (holly oak)
Quercus ilicifolia (bear oak)
Quercus × jolonensis (Jolon Oak)
Quercus kelloggii (Black Oak)
Quercus laevis (American turkey oak)
Quercus laurifolia (swamp laurel oak)
Quercus lobata (Valley Oak)
Quercus lyrata (overcup oak)
Quercus macrocarpa (Bur Oak)
Quercus marilandica (blackjack oak)
Quercus michauxii (swamp chestnut oak)
Quercus montana (chestnut oak)
Quercus × morehus (Oracle Oak)
Quercus muehlenbergii (chinkapin oak)
Quercus myrtifolia (Myrtle Oak)
Quercus nigra (water oak)
Quercus palustris (pin oak)
Quercus petraea (sessile oak)
Quercus robur (English oak)
Quercus robur 'Concordia' (Golden Oak)
Quercus rotundifolia (sweet acorn oak)
Quercus rubra (red oak)
Quercus sadleriana (Sadler's Oak)
Quercus × saulii (Saul's oak)
Quercus shumardii (Shumard Oak Tree)
Quercus spp. (oaks)
Quercus stellata (post oak)
Quercus suber (cork oak)
Quercus texana (Nuttall Oak Tree)
Quercus turbinella (Sonoran scrub oak)
Quercus × undulata (Wavyleaf Oak)
Quercus vacciniifolia (Huckleberry Oak)
Quercus velutina (black oak)
Quercus virginiana (Southern Live Oak)
Quercus wislizeni (Interior Live Oak)
Rabelera holostea (greater stitchwort)
Rabelera spp.
Racomitrium lanuginosum (Woolly Fringe-moss)
Racomitrium spp.
Radula complanata (Flat-leaved Scalewort)
Radula spp.
Rafinesquia neomexicana (Desert Chicory)
Rafinesquia spp.
Ranunculus abortivus (small-flowered buttercup)
Ranunculus acris (meadow buttercup)
Ranunculus aquatilis (common water-crowfoot)
Ranunculus asiaticus (Persian Buttercup)
Ranunculus auricomus (Goldilocks Buttercup)
Ranunculus bulbosus (bulbous buttercup)
Ranunculus californicus (California buttercup)
Ranunculus fascicularis (Early Buttercup)
Ranunculus flammula (Lesser Spearwort)
Ranunculus glaberrimus (sagebrush buttercup)
Ranunculus lappaceus (Australian Buttercup)
Ranunculus lingua (Greater Spearwort)
Ranunculus muricatus (Rough-fruited buttercup)
Ranunculus occidentalis (Western Buttercup)
Ranunculus omiophyllus (Round-leaved Crowfoot)
Ranunculus recurvatus (Hooked buttercup)
Ranunculus repens (creeping buttercup)
Ranunculus sardous (hairy buttercup)
Ranunculus sceleratus (cursed crowfoot)
Ranunculus spp. (buttercups)
Raphanus raphanistrum (Wild radish)
Raphanus spp. (Radishes)
Rapistrum rugosum (annual bastard cabbage)
Rapistrum spp.
Ratibida columnifera (upright prairie coneflower)
Ratibida pinnata (grey-headed coneflower)
Ratibida spp.
Ravenala spp.
Ravenea rivularis (Majesty Palm)
Ravenea spp.
Rehderodendron spp.
Reseda lutea (Wild Mignonette)
Reseda luteola (Weld)
Reseda spp. (mignonettes)
Restio
Reynoutria × bohemica (Bohemian Knotweed)
Reynoutria japonica (Japanese knotweed)
Reynoutria spp. (Rhizomatous Knotweeds)
Rhagodia candolleana (Seaberry Saltbush)
Rhagodia spp.
Rhamnus cathartica (common buckthorn)
Rhamnus crocea (Redberry Buckthorn)
Rhamnus ilicifolia (hollyleaf redberry)
Rhamnus spp. (Buckthorns)
Rhaphiolepis indica (Indian Hawthorn)
Rhaphiolepis spp.
Rhaphiolepis umbellata 'Minor' (rhaphiolepis)
Rhapidophyllum hystrix (Needle Palm)
Rhapidophyllum spp.
Rhapis excelsa (Lady Palm Tree)
Rhapis spp.
Rheum palmatum 'Atrosanguineum' (ornamental rhubarb)
Rheum rhabarbarum (Rhubarb)
Rheum spp.
Rhexia mariana (Maryland meadowbeauty)
Rhexia spp. (Meadowbeauties)
Rhexia virginica (Virginia meadowbeauty)
Rhinanthus minor (Yellow Rattle)
Rhinanthus spp. (Rattles)
Rhinotropis californica (California milkwort)
Rhinotropis spp.
Rhizomnium punctatum (Dotted Thyme-moss)
Rhizomnium spp.
Rhizophora mangle (red mangrove)
Rhizophora spp. (true mangroves)
Rhizophora stylosa (spotted mangrove)
Rhodamnia rubescens (scrub turpentine)
Rhodamnia spp.
Rhodanthemum spp.
Rhodiola integrifolia (western roseroot)
Rhodiola rosea (Roseroot)
Rhodiola spp.
Rhodochiton atrosanguineus (purple bell vine)
Rhodochiton spp.
Rhododendron 'Anah Kruschke' (Anah Kruschke Rhododendron)
Rhododendron 'Azurro' (Azurro Rhododendron)
Rhododendron 'Bow Bells' (Bow Bells Rhododendron)
Rhododendron calendulaceum (Flame Azalea)
Rhododendron canescens (Mountain Azalea)
Rhododendron cf. catawbiense (lavender hybrid) (Lavender Rhododendron)
Rhododendron cf. catawbiense (red hybrid) (Red Rhododendron)
Rhododendron 'Christmas Cheer' (Christmas Cheer Rhododendron)
Rhododendron 'Cilpinense' (Cilpinense Rhododendron)
Rhododendron 'Conversation Piece' (Conversation Piece Azalea)
Rhododendron 'Fantastica' (Fantastica Rhododendron)
Rhododendron 'Fred Peste' (Fred Peste Rhododendron)
Rhododendron 'Girard''s Crimson' (Girard's Crimson Azalea)
Rhododendron 'Girard''s Fuchsia' (Girard's Fuchsia Azalea)
Rhododendron 'Glacier' (Glacier Rhododendron)
Rhododendron groenlandicum (Labrador Tea)
Rhododendron 'Hachmann''s Charmant' (Hachmann's Charmant)
Rhododendron 'Hardy Gardenia' (Hardy Gardenia Azalea)
Rhododendron 'Herbert' (Herbert Rhododendron)
Rhododendron 'Hino-Crimson' (Hino-Crimson Azalea)
Rhododendron 'Hinode-giri' (Hinode-giri Azalea)
Rhododendron × hybridum (garden rhododendron)
Rhododendron impeditum (Dwarf Purple Rhododendron)
Rhododendron indicum (southern Indian azalea)
Rhododendron japonicum (Japanese azalea)
Rhododendron 'Ken Janeck' (Ken Janeck Rhododendron)
Rhododendron lepidotum (scaly rhododendron)
Rhododendron luteum (Yellow Azalea)
Rhododendron macrophyllum (Pacific Rhododendron)
Rhododendron maximum (great rhododendron)
Rhododendron menziesii (mock azalea)
Rhododendron mucronulatum (Korean azalea)
Rhododendron 'Nancy Evans' (Nancy Evans Rhododendron)
Rhododendron 'Nova Zembla' (Nova Zembla Rhododendron)
Rhododendron occidentale (western azalea)
Rhododendron 'Odee Wright' (Odee Wright Rhododendron)
Rhododendron periclymenoides (Pinxter Flower)
Rhododendron ponticum (Common Rhododendron)
Rhododendron 'President Roosevelt' (President Roosevelt Rhododendron)
Rhododendron prinophyllum (early azalea)
Rhododendron quinquefolium (quinquefolium azalea)
Rhododendron 'Rosa Mundi' (Rosa Mundi Rhododendron)
Rhododendron 'Roseum Pink' (Roseum Pink Rhododendron)
Rhododendron schlippenbachii (royal azalea)
Rhododendron simsii (Indian Azalea)
Rhododendron 'Snowbird' (Snowbird Rhododendron)
Rhododendron spp. (rhododendrons and azaleas)
Rhododendron stenopetalum 'Linearifolium' (spider azalea)
Rhododendron 'Unique' (Unique Rhododendron)
Rhododendron viscosum (swamp azalea)
Rhododendron 'Vulcan''s Flame' (Vulcan's Flame Rhododendron)
Rhododendron yakushimanum (yakushima rhododendron)
Rhodomyrtus psidioides (Native Guava)
Rhodomyrtus spp.
Rhodosphaera rhodanthema (deep yellow wood)
Rhodosphaera spp.
Rhodotypos scandens (jetbead)
Rhodotypos spp.
Rhus aromatica (fragrant sumac)
Rhus copallinum (shining sumac)
Rhus glabra (smooth sumac)
Rhus integrifolia (lemonade berry)
Rhus lanceolata (Prairie flameleaf sumac)
Rhus ovata (sugar bush)
Rhus × pulvinata (Northern Sumac)
Rhus spp. (sumacs)
Rhus trilobata (Skunkbush Sumac)
Rhus typhina (staghorn sumac)
Rhus typhina 'Dissecta' (cutleaf staghorn sumac)
Rhus virens (evergreen sumac)
Rhynchosia spp. (Snoutbeans)
Rhynchospora colorata (White-Top Sedge)
Rhynchospora spp. (Beaksedges)
Rhynchostegium confertum (Clustered Feather-moss)
Rhynchostegium spp.
Rhytidiadelphus loreus (Lanky Moss)
Rhytidiadelphus spp.
Rhytidiadelphus squarrosus (Square Gooseneck Moss)
Rhytidosporum procumbens (white marianth)
Rhytidosporum spp.
Ribes americanum (American Black Currant)
Ribes aureum (Golden Currant)
Ribes bracteosum (stink current)
Ribes cereum (wax currant)
Ribes cynosbati (prickly gooseberry)
Ribes divaricatum (Coast Black Gooseberry)
Ribes lacustre (swamp gooseberry)
Ribes malvaceum (Chaparral Currant)
Ribes missouriense (Missouri Gooseberry)
Ribes nevadense (mountain pink currant)
Ribes nigrum (Blackcurrant)
Ribes roezlii (Sierra Gooseberry)
Ribes rubrum (Red Currant)
Ribes sanguineum (red flowering currant)
Ribes sanguineum 'Pulborough Scarlet' (Pulborough Scarlet Currant)
Ribes speciosum (Fuchsiaflower Gooseberry)
Ribes spp. (currants and gooseberries)
Ribes uva-crispa (European gooseberry)
Riccia spp. (Crystalworts)
Richardia grandiflora (largeflower Mexican clover)
Richardia spp. (Mexican clovers)
Richea pandanifolia (Pandani)
Richea scoparia (scoparia)
Richea spp.
Ricinocarpos pinifolius (Wedding Bush)
Ricinocarpos spp.
Ricinus communis (castor bean)
Ricinus spp.
Rivina humilis (pigeonberry)
Rivina spp.
Robinia pseudoacacia (black locust)
Robinia pseudoacacia 'Frisia' (golden black locust)
Robinia spp. (Locust Trees)
Rodgersia (rodgersia)
Roepera spp. (Twinleaves)
Romneya coulteri (Matilija poppy)
Romneya spp. (Matilija poppies)
Romulea rosea (Rosy sandcrocus)
Romulea spp. (Froetangs)
Rorippa palustris (Bog Yellowcress)
Rorippa spp. (yellowcresses)
Rosa acicularis (Prickly Wild Rose)
Rosa 'Adélaide d''Orléans' (Adelaide d'Orleans Rose)
Rosa 'Alain Blanchard' (Alain Blanchard Rose)
Rosa 'Apricot Drift' (Apricot Drift Rose)
Rosa arkansana (prairie rose)
Rosa arvensis (Field Rose)
Rosa 'Autumn Sunset' (Autumn Sunset Rose)
Rosa banksiae (Lady Banks Rose)
Rosa banksiae 'Lutea'
Rosa 'Bienenweide Rosa'
Rosa 'Bolero' (Bolero Rose)
Rosa 'Buff Beauty' (Buff Beauty Rose)
Rosa californica (California Wild Rose)
Rosa canina (dog rose)
Rosa carolina (Carolina rose)
Rosa 'Chevy Chase'
Rosa 'Coral Drift' (Coral Drift Rose)
Rosa 'Don Juan' (Don Juan Rose)
Rosa 'Double Knock Out' (Double Knock Out Rose)
Rosa 'Felicia' (Felicia Rose)
Rosa 'Félicité et Perpétue' (Felicite et Perpetue)
Rosa (Floribunda Group) (floribunda roses)
Rosa 'Francis E. Lester' (Francis E. Lester Rose)
Rosa 'Geranium'
Rosa glauca (redleaf rose)
Rosa 'Golden Wings' (Golden Wings Rose)
Rosa gymnocarpa (bald-hip rose)
Rosa gymnocarpa (bald-hip rose)
Rosa 'Hansa' (Hansa Rose)
Rosa 'Intrigue' (Intrigue Rose)
Rosa 'Julia Child' (Julia Child Rose)
Rosa 'Lykkefund' (Lykkefund Rose)
Rosa 'Marchesa Boccella' (Marchesa Boccella Rose)
Rosa multiflora (multiflora rose)
Rosa nutkana (Nootka rose)
Rosa odorata 'Mutabilis' (Mutabilis Rose)
Rosa palustris (swamp rose)
Rosa 'Peach Drift' (Peach Drift Rose)
Rosa 'Peggy Martin' (Peggy Martin Rose)
Rosa pisocarpa (clustered wild rose)
Rosa 'Rose de Rescht' (Rose de Rescht)
Rosa rubiginosa (Sweet-brier)
Rosa rugosa (rugosa rose)
Rosa 'Sally Holmes' (Sally Holmes Rose)
Rosa 'Sander''s White Rambler' (Sanders' White Rambler)
Rosa 'Seagull' (Seagull Rose)
Rosa setigera (climbing prairie rose)
Rosa 'Special Anniversary'
Rosa spinosissima (Burnet Rose)
Rosa spinosissima 'Dunwich Rose'
Rosa spinosissima 'Falkland'
Rosa 'Stanwell Perpetual' (Stanwell Perpetual Rose)
Rosa 'Sweet Drift' (Sweet Drift Rose)
Rosa 'The Generous Gardener' (The Generous Gardener Rose)
Rosa willmottiae
Rosa woodsii (Woods Rose)
Rosmarinus officinalis 'Tuscan Blue' (Tuscan Blue Rosemary)
Rosmarinus spp.
Rosulabryum billardierei
Rosulabryum spp.
Roystonea spp.
Rubia peregrina (Wild Madder)
Rubia spp.
Rubus allegheniensis (Allegheny blackberry)
Rubus armeniacus (Himalayan blackberry)
Rubus caesius (European dewberry)
Rubus calycinoides (Creeping Raspberry)
Rubus chamaemorus (cloudberry)
Rubus 'Chester' (Chester Thornless Blackberry)
Rubus cuneifolius (sand blackberry)
Rubus ellipticus (Golden Raspberry)
Rubus flagellaris (Common Dewberry)
Rubus fruticosus
Rubus hayata-koidzumii (creeping raspberry)
Rubus hispidus (swamp dewberry)
Rubus idaeus (raspberry)
Rubus laciniatus (evergreen blackberry)
Rubus leucodermis (Blackcap Raspberry)
Rubus moluccanus (Molucca Bramble)
Rubus occidentalis (black raspberry)
Rubus odoratus (purple-flowered raspberry)
Rubus parviflorus (thimbleberry)
Rubus parvifolius (small-leaf bramble)
Rubus pensilvanicus (Pennsylvania Blackberry)
Rubus phoenicolasius (wineberry)
Rubus pubescens (dwarf raspberry)
Rubus rolfei (Creeping Bramble)
Rubus rosifolius (roseleaf bramble)
Rubus spectabilis (salmonberry)
Rubus spectabilis 'Olympic Double' (Olympic Double Salmonberry)
Rubus spp. (brambles)
Rubus tricolor (Chinese Bramble)
Rubus trivialis (southern dewberry)
Rubus tuberculatus (Ruderal Corylifolian)
Rubus ulmifolius (elmleaf blackberry)
Rubus ursinus (trailing blackberry)
Rubus vestitus (Vested Blackberry)
Rudbeckia × 'American Gold Rush' (American Gold Rush Black-Eyed Susan)
Rudbeckia amplexicaulis (clasping coneflower)
Rudbeckia fulgida (Black-eyed Susan)
Rudbeckia fulgida var. deamii (Deams Black-Eyed Susan)
Rudbeckia fulgida var. fulgida (Orange Coneflower)
Rudbeckia fulgida var. speciosa 'Viette's Little Suzy' (Little Suzy Black-Eyed Susan)
Rudbeckia fulgida var. sullivantii 'Goldsturm' (black-eyed Susan)
Rudbeckia hirta (large black-eyed Susan)
Rudbeckia hirta 'Indian Summer' (Indian Summer Black-Eyed Susan)
Rudbeckia hirta 'Prairie Sun' (Prairie Sun Rudbeckia)
Rudbeckia laciniata (cutleaf coneflower)
Rudbeckia occidentalis (Western Black-eyed Susan)
Rudbeckia spp. (black-eyed Susans and coneflowers)
Rudbeckia subtomentosa (sweet black-eyed Susan)
Rudbeckia triloba (Brown-Eyed Susan)
Ruellia caroliniensis (Carolina ruellia)
Ruellia humilis (hairy ruellia)
Ruellia nudiflora (violet ruellia)
Ruellia simplex (Mexican Petunia)
Ruellia spp. (Ruellias)
Ruellia strepens (smooth ruellia)
Rumex acetosa (Sorrel)
Rumex acetosella (sheep sorrel)
Rumex brownii (Slender Dock)
Rumex conglomeratus (Clustered Dock)
Rumex crispus (curly-leaved dock)
Rumex cristatus (Greek Dock)
Rumex hastatulus (Hastate-leaved dock)
Rumex hydrolapathum (Water Dock)
Rumex hymenosepalus (Canaigre Dock)
Rumex obtusifolius (broad-leaved dock)
Rumex sagittatus (Climbing dock)
Rumex salicifolius (willow dock)
Rumex sanguineus (Wood Dock)
Rumex spp. (docks and sorrels)
Ruschia spp. (Tentfigs)
Ruscus aculeatus (butcher's-broom)
Ruscus spp.
Russelia spp.
Ruta spp. (rues)
Rytidosperma pallidum (red-anther wallaby grass)
Rytidosperma spp. (Wallaby grasses)
Sabal minor (Dwarf Palmetto)
Sabal palmetto (cabbage palmetto)
Sabal spp. (Palmettos)
Sabatia angularis (Rosepink)
Sabatia campestris (Meadow Pink)
Sabatia spp. (rose gentians)
Sabatia stellaris (marsh pink)
Sagina procumbens (pearlwort)
Sagina spp. (pearlworts)
Sagina subulata (Irish moss)
Sagina subulata 'Aurea' (Golden Irish Moss)
Sagittaria lancifolia (lanceleaf arrowhead)
Sagittaria latifolia (Wapato)
Sagittaria sagittifolia (Arrowhead)
Sagittaria spp. (Arrowheads)
Saintpaulia ionantha (variegated) (Variegated African Violet)
Saintpaulia spp.
Sairocarpus nuttallianus (Nuttall's Snapdragon)
Sairocarpus spp.
Salicornia europaea (Common Glasswort)
Salicornia pacifica (Pacific Glasswort)
Salicornia quinqueflora (Beaded Samphire)
Salicornia spp. (pickleweeds)
Salix alba (white willow)
Salix alba 'Tristis' (Golden Weeping Willow)
Salix atrocinerea (Rusty Willow)
Salix aurita (Eared Willow)
Salix babylonica (weeping willow)
Salix babylonica 'Tortuosa' (corkscrew willow)
Salix caprea (goat willow)
Salix caroliniana (Carolina willow)
Salix cinerea (Grey Willow)
Salix discolor (White Pussy Willow)
Salix exigua (Narrowleaf Willow)
Salix × fragilis (hybrid crack willow)
Salix gooddingii (Goodding's willow)
Salix hookeriana (Coastal Willow)
Salix integra 'Hakuro Nishiki' (Variegated Willow)
Salix interior (interior sandbar willow)
Salix laevigata (red willow)
Salix lasiandra (Pacific willow)
Salix lasiolepis (Arroyo Willow)
Salix × matsudana × alba (Willow Hybrid Tree)
Salix nakamurana var. yezoalpina (Yezo Alpine Willow)
Salix nigra (black willow)
Salix purpurea (Purple Willow)
Salix purpurea 'Nana' (dwarf Alaskan purple willow)
Salix repens (Creeping Willow)
Salix scouleriana (Scouler’s willow)
Salix sitchensis (Sitka willow)
Salix spp. (Willows)
Salix viminalis (basket willow)
Salsola australis (Southern Russian Thistle)
Salsola spp. (Russian Thistles)
Salsola tragus (Prickly Russian Thistle)
Salvia (Sages)
Salvia × 'Amistad' (Amistad Sage)
Salvia apiana (white sage)
Salvia azurea (giant blue sage)
Salvia canescens var. daghestanica (Daghestan Sage)
Salvia coccinea (Tropical sage)
Salvia columbariae (Chia)
Salvia confertiflora
Salvia dorrii (Dorr's Sage)
Salvia farinacea (mealy sage)
Salvia × floriferior (Russian Sage)
Salvia fulgens (cardinal sage)
Salvia greggii (Autumn sage)
Salvia × 'Indigo Spires' (Indigo Spires Sage)
Salvia leucantha (Mexican Bush Sage)
Salvia leucophylla (purple sage)
Salvia mellifera (black sage)
Salvia microphylla (Baby Sage)
Salvia microphylla 'Hot Lips' (baby sage, Hot Lips)
Salvia nemorosa (Woodland Sage)
Salvia nemorosa 'Blue Hill' (Blue Hill Meadow Sage)
Salvia nemorosa 'Caradonna' (Caradonna Meadow Sage)
Salvia nemorosa 'East Friesland' (East Friesland Meadow Sage)
Salvia nemorosa 'May Night' (May Night woodland sage)
Salvia nutans
Salvia rosmarinus (rosemary)
Salvia spathacea (Hummingbird Sage)
Salvia sylvestris 'Mainacht' (May Night Sage)
Salvia verbenaca (wild clary)
Salvia verticillata 'Purple Rain' (Purple Rain Sage)
Salvia x sylvestris 'Caradonna' (caradonna sage)
Salvia yangii (Russian Sage)
Sambucus (elders)
Sambucus canadensis (American black elderberry)
Sambucus cerulea (Blue Elderberry)
Sambucus gaudichaudiana (White Elderberry)
Sambucus nigra
Sambucus nigra 'Black Lace' (Black Lace Elderberry)
Sambucus nigra 'Eva' (Black Beauty Elderberry)
Sambucus nigra f. laciniata (Cut-leaved Elder)
Sambucus nigra 'Guincho Purple' (Guincho Purple Elder)
Sambucus racemosa (red elderberry)
Sambucus racemosa 'Plumosa Aurea' (Golden Elder)
Sambucus spp. (elderberry)
Samolus parviflorus (seaside brookweed)
Samolus repens (Sea Primrose)
Samolus spp.
Sanchezia spp.
Sanguinaria spp.
Sanguisorba minor (Salad Burnet)
Sanguisorba spp. (burnets)
Sanguisorbia hakusanensis 'Lilac Squirrel' (Pink squirrel tails)
Sanguisorbia spp.
Sanicula bipinnatifida (Purple Sanicle)
Sanicula canadensis (Black Snakeroot)
Sanicula crassicaulis (Pacific Sanicle)
Sanicula europaea (wood sanicle)
Sanicula odorata (Clustered Sanicle)
Sanicula spp. (sanicles)
Sansevieria spp. (Mother-in-law's Tongues)
Sansevieria trifasciata (Snake Plant)
Santalum acuminatum (Desert Quandong)
Santalum lanceolatum (Blue Bush)
Santalum spp.
Santolina chamaecyparissus (cotton vavender)
Santolina rosmarinifolia (Green Lavender Cotton)
Santolina spp. (Lavender-cottons)
Sapindus drummondii (Western Soapberry)
Sapindus spp.
Saponaria officinalis (common soapwort)
Saponaria spp.
Sarcobatus spp.
Sarcobatus vermiculatus (Greasewood)
Sarcococca confusa (tall sarcococca)
Sarcococca hookeriana var. humilis (low sarcococca)
Sarcococca spp.
Sarcodes sanguinea (Snowplant)
Sarcodes spp.
Sarcopetalum harveyanum (pearl vine)
Sarcopetalum spp.
Sarracenia flava (yellow pitcher plant)
Sarracenia leucophylla (white pitcher plant)
Sarracenia × mitchelliana (Mitchell's Pitcher Plant)
Sarracenia × moorei (Moore's Pitcher Plant)
Sarracenia × naczii (Naczi's Pitcher Plant)
Sarracenia purpurea (purple pitcher plant)
Sarracenia spp. (North American pitcher plants)
Saruma henryi (upright wild ginger)
Saruma spp.
Satureja hortensis (Summer Savory)
Satureja montana (Winter Savory)
Satureja spp.
Saururus cernuus (Lizard's Tail)
Saururus spp.
Saxifraga aizoides (Yellow Saxifrage)
Saxifraga granulata (Meadow Saxifrage)
Saxifraga spp. (Saxifrages)
Saxifraga stolonifera (strawberry begonia)
Saxifraga tridactylites (Rue-leaved Saxifrage)
Saxifraga umbrosa
Saxifraga x urbium (London pride)
Scabiosa 'Butterfly Blue' (dwarf blue pincushion flower)
Scabiosa canescens (Gray Pincushion Flower)
Scabiosa 'Pink Mist' (Pink Mist Scabious)
Scabiosa spp. (Pincushion flowers)
Scaevola aemula (Fairy Fan-flower)
Scaevola albida (white fanflower)
Scaevola calendulacea (dune fan-flower)
Scaevola crassifolia (Cushion Fanflower)
Scaevola ramosissima (Hairy Fan-flower)
Scaevola spp. (fanflowers)
Scaevola taccada (beach naupaka)
Scandosorbus intermedia (Swedish Whitebeam)
Scandosorbus spp.
Scapania spp.
Sceptridium dissectum (Cutleaf Grapefern)
Sceptridium spp. (grapeferns)
Schefflera arboricola (Dwarf Umbrella Tree)
Schefflera spp.
Schelhammera spp.
Schelhammera undulata (lilac lily)
Schinus areira (Peppercorn Tree)
Schinus molle (Peruvian Pepper Tree)
Schinus spp. (peppertrees)
Schinus terebinthifolia (Brazilian pepper)
Schisandra chinensis (Five-flavor Berry)
Schisandra spp.
Schistidium crassipilum (Thickpoint Bloom Moss)
Schistidium spp.
Schizachyrium scoparium (Little Bluestem)
Schizachyrium spp.
Schizaea bifida (Forked Comb Fern)
Schizaea spp.
Schizophragma hydrangeoides (Japanese Climbing Hydrangea)
Schizophragma spp.
Schlumbergera × buckleyi (Christmas Cactus)
Schlumbergera spp. (Christmas cacti)
Schoenoplectus acutus (hardstem bulrush)
Schoenoplectus californicus (California bulrush)
Schoenoplectus spp. (Schoenoplectus Bulrushes)
Schoenoplectus tabernaemontani (Soft-stem Bullrush)
Schoenus apogon (common bog-rush)
Schoenus spp.
Sciadopitys spp.
Sciadopitys verticillata (Japanese umbrella pine)
Scilla forbesii (Forbes' Glory-of-the-snow)
Scilla spp. (Squills)
Scilla verna (Spring Squill)
Scindapsus pictus (Satin Pothos)
Scindapsus spp.
Scirpus atrovirens (dark green bulrush)
Scirpus cyperinus (Woolgrass)
Scirpus microcarpus (small-fruited bulrush)
Scirpus spp. (Scirpus Bulrushes)
Scleranthus biflorus
Scleranthus spp.
Scleria spp. (nutrushes)
Scoliopus bigelovii (California fetid adderstongue)
Scoliopus spp.
Scorzoneroides autumnalis (Autumn Hawkbit)
Scorzoneroides spp.
Scrophularia californica (California beeplant)
Scrophularia marilandica (late figwort)
Scrophularia nodosa (Common Figwort)
Scrophularia spp. (figworts)
Scutellaria drummondii (Drummond's skullcap)
Scutellaria elliptica (Hairy Skullcap)
Scutellaria galericulata (Marsh Skullcap)
Scutellaria integrifolia (Helmet skullcap)
Scutellaria lateriflora (side-flowering skullcap)
Scutellaria mexicana (Paperbag Bush)
Scutellaria nana
Scutellaria ovata (Heart-leaved Skullcap)
Scutellaria spp. (skullcaps)
Scutellaria suffrutescens (Pink Skullcap)
Searsia spp. (Karees)
Securigera spp.
Securigera varia (purple crownvetch)
Sedum acre (Biting Stonecrop)
Sedum anglicum (English Stonecrop)
Sedum × 'Autumn Fire' (Autumn Fire Stonecrop)
Sedum 'Bertram Anderson' (Bertram Anderson Stonecrop)
Sedum divergens (Spreading Stonecrop)
Sedum ewersii (Pink Stonecrop)
Sedum kimnachii (Kimnach's Stonecrop)
Sedum lanceolatum (Spearleaf Stonecrop)
Sedum oreganum (Oregon Stonecrop)
Sedum 'Purple Emperor' (Purple Emperor Stonecrop)
Sedum × rubrotinctum (Christmas-cheer)
Sedum sarmentosum (Stringy Stonecrop)
Sedum sexangulare
Sedum sieboldii (October Daphne)
Sedum spathifolium 'Cape Blanco' (Cape Blanco sedum)
Sedum spathulifolium (Broadleaf Stonecrop)
Sedum spectabile (sedum)
Sedum spectabile 'Autumn Joy' (Autumn Joy Stonecrop)
Sedum stenopetalum (Wormleaf Stonecrop)
Sedum ternatum (woodland stonecrop)
Sedum × 'Vera Jameson' (Vera Jameson Stonecrop)
Selaginella bigelovii (Bigelow's Spikemoss)
Selaginella spp. (Spikemosses)
Selaginella uliginosa (Swamp Spikemoss)
Selago spp. (Bitterbushes)
Selenicereus spp. (moonlight cactuses)
Selenicereus undatus (Dragon Fruit)
Sematophyllum homomallum (Bronze Moss)
Sematophyllum spp.
Sempervivum arachnoideum (cobweb houseleek)
Sempervivum calcareum
Sempervivum species & cvs (Houseleek)
Sempervivum tectorum (Hens and Chicks)
Senecio ampullaceus (Texas ragwort)
Senecio elegans (Red-purple Ragwort)
Senecio flaccidus (threadleaf groundsel)
Senecio glomeratus (Cutleaf burnweed)
Senecio hispidulus (Hill Fireweed)
Senecio inaequidens (Narrow-leaved Ragwort)
Senecio integerrimus (Tall western groundsel)
Senecio linearifolius (fireweed groundsel)
Senecio madagascariensis (Madagascar Ragwort)
Senecio minimus (coastal burnweed)
Senecio odoratus (Scented Groundsel)
Senecio pinnatifolius (pinnate-leaved groundsel)
Senecio pterophorus (Shoddy Ragwort)
Senecio quadridentatus (cotton burnweed)
Senecio spp. (groundsels)
Senecio squalidus (Oxford Ragwort)
Senecio sylvaticus (wood groundsel)
Senecio triangularis (Arrowleaf Senecio)
Senecio viscosus (Sticky Groundsel)
Senecio vulgaris (common groundsel)
Senega alba (white milkwort)
Senegalia greggii (Catclaw Acacia)
Senegalia spp. (Hook-Thorns)
Senega lutea (orange milkwort)
Senega nana (candyroot)
Senega paniculata (rootbeer plant)
Senega sanguinea (field milkwort)
Senega spp.
Senna artemisioides (silver senna)
Senna bicapsularis (Butterfly Bush Senna)
Senna covesii (Coues' senna)
Senna hebecarpa (American senna)
Senna lindheimeriana (Lindheimer's Senna)
Senna marilandica (Maryland senna)
Senna obtusifolia (American Sicklepod)
Senna pendula (Christmas Senna)
Senna roemeriana (Two-leaved Senna)
Senna septemtrionalis (Arsenic Bush)
Senna spp. (sennas)
Sequoiadendron giganteum (giant sequoia)
Sequoiadendron giganteum 'Pendulum' (weeping Giant Sequoia)
Sequoiadendron spp.
Sequoia sempervirens (Coast Redwood)
Sequoia spp. (Redwood)
Serapias spp. (Tongue Orchids)
Serenoa repens (saw palmetto)
Serenoa spp.
Serratula spp.
Sesbania drummondii (Rattlebush)
Sesbania grandiflora (Hummingbird Tree)
Sesbania herbacea (bigpod sesbania)
Sesbania spp. (riverhemps)
Sesbania vesicaria (Bladder Pod)
Seseli libanotis
Seseli spp.
Sesleria
Sesleria autumnalis (Autumn Moor Grass)
Sesleria heufleriana
Sesleria nitida
Sesleria spp. (moor grass)
Sesuvium portulacastrum (sea purslane)
Sesuvium spp. (Sea-purslanes)
Setaria faberi (giant foxtail)
Setaria parviflora (knotroot bristlegrass)
Setaria pumila (yellow foxtail)
Setaria spp. (foxtails and bristlegrasses)
Setaria viridis (Green Bristle Grass)
Shepherdia argentea (Silver Buffaloberry)
Shepherdia canadensis (Russet Buffaloberry)
Shepherdia spp.
Sherardia arvensis (Field madder)
Sherardia spp.
Shibataea kumasasa (Ruscus-leaved Bamboo)
Shibataea spp.
Sibbaldiopsis spp.
Sibbaldiopsis tridentata (three-toothed cinquefoil)
Sicyos angulatus (Oneseed Bur Cucumber)
Sicyos spp.
Sida abutilifolia (spreading sida)
Sida cordifolia (flannel weed)
Sidalcea campestris (Meadow Checker-mallow)
Sidalcea hendersonii (Henderson's Checker-mallow)
Sidalcea malviflora (Rose Checker-mallow)
Sidalcea oregana (Oregon Checker-Mallow)
Sidalcea sparsifolia (Southern Checkerbloom)
Sidalcea spp. (Checkerblooms)
Sidalcea virgata (Virgate Checker-mallow)
Sida rhombifolia (Cuban jute)
Sida spp. (Sidas)
Sida ulmifolia (Common Fanpetals)
Sideroxylon lanuginosum (Gum bumelia)
Sideroxylon spp.
Sigesbeckia orientalis (Eastern St Paul's-wort)
Sigesbeckia spp.
Silene acaulis (Moss Campion)
Silene coronaria (Rose campion)
Silene dioica (red campion)
Silene flos-cuculi (ragged-robin)
Silene gallica (Small-flowered Catchfly)
Silene × hampeana (Hybrid Campion)
Silene inflata (bladder campion)
Silene laciniata (cardinal catchfly)
Silene latifolia (white campion)
Silene nocturna (night-flowering catchfly)
Silene spp. (Catchflies)
Silene stellata (starry campion)
Silene uniflora (Sea Campion)
Silene virginica (fire pink)
Silene vulgaris (bladder campion)
Silphium integrifolium (prairie rosinweed)
Silphium laciniatum (compass plant)
Silphium perfoliatum (cup plant)
Silphium spp. (Rosinweeds)
Silphium terebinthinaceum (prairie dock)
Silybum marianum (milk thistle)
Silybum spp.
Simmondsia chinensis (jojoba)
Simmondsia spp.
Sinapis alba (White Mustard)
Sinapis spp.
Sison amomum (stone parsley)
Sison spp.
Sisymbrium altissimum (Tall Tumblemustard)
Sisymbrium irio (London rocket)
Sisymbrium loeselii (False London-rocket)
Sisymbrium officinale (Hedge mustard)
Sisymbrium orientale (eastern rocket)
Sisymbrium spp. (Hedgemustards)
Sisyrinchium angustifolium (Blue-Eyed Grass)
Sisyrinchium bellum (western blue-eyed grass)
Sisyrinchium californicum (Golden Blue-eyed Grass)
Sisyrinchium idahoense (Idaho Blue-eyed Grass)
Sisyrinchium micranthum (Blue Pigroot)
Sisyrinchium pruinosum (Roadside Blue-eyed Grass)
Sisyrinchium spp. (blue-eyed grasses)
Sisyrinchium striatum (pale yellow-eyed grass)
Sium spp.
Sium suave (water parsnip)
Sixalix atropurpurea (Sweet scabious)
Sixalix spp.
Skimmia japonica (Japanese skimmia)
Skimmia spp.
Smallanthus spp.
Smallanthus uvedalia (bear's foot)
Smilax auriculata (Earleaf Greenbrier)
Smilax australis (Austral Sarsaparilla)
Smilax bona-nox (saw greenbrier)
Smilax glauca (sawbrier)
Smilax glyciphylla (Sweet Sarsaparilla)
Smilax herbacea (smooth carrionflower)
Smilax rotundifolia (roundleaf greenbrier)
Smilax smallii (Lanceleaf Greenbrier)
Smilax spp. (greenbriers)
Smilax tamnoides (bristly greenbrier)
Smyrnium olusatrum (Alexanders)
Smyrnium perfoliatum (perfoliate alexanders)
Smyrnium spp.
Solanum americanum (American black nightshade)
Solanum aviculare (New Zealand nightshade)
Solanum carolinense (Carolina horsenettle)
Solanum chrysotrichum (giant devil's-fig)
Solanum crispum 'Glasnevin' (Glasnevin Potato Vine)
Solanum dimidiatum (western horsenettle)
Solanum douglasii (greenspot nightshade)
Solanum dulcamara (bittersweet nightshade)
Solanum elaeagnifolium (silverleaf nightshade)
Solanum emulans (eastern black nightshade)
Solanum laciniatum (kangaroo-apple)
Solanum lycopersicum 'Big Boy' (Big Boy Tomato)
Solanum lycopersicum 'Black Cherry' (Black Cherry Tomato)
Solanum lycopersicum 'Black Krim' (Black Krim Tomato)
Solanum lycopersicum 'Brandywine' (Brandywine Tomato)
Solanum lycopersicum 'Bush Early Girl' (Bush Early Girl Tomato)
Solanum lycopersicum 'Celebrity' (Celebrity Tomato)
Solanum lycopersicum 'Cherokee Purple' (Cherokee Purple Tomato)
Solanum lycopersicum 'Early Girl' (Early Girl Tomato)
Solanum lycopersicum 'Glacier' (Glacier Tomato)
Solanum lycopersicum 'Heatmaster' (Heatmaster Tomato)
Solanum lycopersicum 'Iron Lady' (Iron Lady Tomato)
Solanum lycopersicum 'Patio' (Patio Tomato)
Solanum lycopersicum 'Patio Princess' (Patio Princess Tomato)
Solanum lycopersicum 'Phoenix' (Phoenix Tomato)
Solanum lycopersicum 'Red Cherry' (Red Cherry Tomato)
Solanum lycopersicum 'Roma' (Roma Tomato)
Solanum lycopersicum 'San Marzano' (San Marzano Tomato)
Solanum lycopersicum 'Stupice' (Stupice Tomato)
Solanum lycopersicum 'Sungold' (Sungold Cherry Tomato)
Solanum lycopersicum 'Sungold' (Sungold Cherry Tomato)
Solanum lycopersicum 'Surefire Red' (Surefire Red Tomato)
Solanum lycopersicum 'Yellow Pear' (Yellow Pear Tomato)
Solanum mauritianum (bugweed)
Solanum melongena 'Black Beauty' (Black Beauty Eggplant)
Solanum melongena 'Ichiban' (Ichiban Eggplant)
Solanum melongena 'Rosa Bianca' (Rosa Bianca Eggplant)
Solanum nigrum (black nightshade)
Solanum parishii (Parish's nightshade)
Solanum physalifolium (hairy nightshade)
Solanum prinophyllum (Forest Nightshade)
Solanum pseudocapsicum (Jerusalem cherry)
Solanum rostratum (buffalobur)
Solanum seaforthianum (Brazilian Nightshade)
Solanum sisymbriifolium (Red Buffalo-bur)
Solanum spp. (nightshades)
Solanum stelligerum (devil's needles)
Solanum tuberosum (potato)
Solanum umbelliferum (bluewitch nightshade)
Solanum xanti (purple nightshade)
Soldanella spp.
Soldanella villosa (Hairy Snowbell)
Soleirolia soleirolii (Baby's tears)
Soleirolia spp.
Solidago altissima (tall goldenrod)
Solidago bicolor (silverrod)
Solidago caesia (bluestem goldenrod)
Solidago canadensis (Canada goldenrod)
Solidago flexicaulis (broad-leaved goldenrod)
Solidago gigantea (giant goldenrod)
Solidago juncea (early goldenrod)
Solidago lepida (Canada goldenrod)
Solidago 'Loysder Crown' (Loysder Crown Solidago)
Solidago mexicana (Southern Seaside Goldenrod)
Solidago nemoralis (field goldenrod)
Solidago odora (Sweet Goldenrod)
Solidago rigida (stiff-leaved goldenrod)
Solidago rugosa (Wrinkle-Leaved Goldenrod)
Solidago rugosa 'Fireworks' (Fireworks Goldenrod)
Solidago sempervirens (northern seaside goldenrod)
Solidago spp. (goldenrods)
Solidago ulmifolia (elm-leaved goldenrod)
Solidago velutina (velvety goldenrod)
Solidago virgaurea (European goldenrod)
Soliva sessilis (common soliva)
Soliva spp.
Sonchus arvensis (marsh sow thistle)
Sonchus asper (prickly sow thistle)
Sonchus fruticosus
Sonchus oleraceus (annual sow thistle)
Sonchus spp. (sow thistles)
Sophora japonica (Japanese Pagoda Tree)
Sophora spp. (Necklacepods)
Sorbaria sorbifolia 'Sem'
Sorbaria spp.
Sorbus alnifolia (Korean Mountain Ash)
Sorbus americana (American mountain ash)
Sorbus aucuparia (European mountain ash)
Sorbus sitchensis (Sitka Mountain Ash)
Sorbus spp. (Rowans and Mountain Ashes)
Sorghastrum nutans (Indiangrass)
Sorghastrum spp.
Sorghum bicolor (Sorghums)
Sorghum halepense (Johnson grass)
Sorghum spp. (Johnsongrasses, milos, sudangrasses, and allies)
Sowerbaea juncea (Rush Lily)
Sowerbaea laxiflora (Purple Tassels)
Sowerbaea spp.
Sparganium erectum (Branched Bur-reed)
Sparganium spp. (bur-reeds)
Spartina alterniflora (saltwater cordgrass)
Spartina anglica (English cordgrass)
Spartina bakeri (Sand Cordgrass)
Spartina spp.
Spartium junceum (Spanish Broom)
Spartium spp.
Spathiphyllum spp. (peace lillies)
Spathiphyllum wallisii (Peace Lily)
Spathoglottis spp.
Spergula arvensis (Corn spurrey)
Spergularia marina (Saltmarsh Sand Spurry)
Spergularia media (Greater Sea-spurry)
Spergularia rubra (Red Sand Spurrey)
Spergularia rupicola (Rock Sea-spurrey)
Spergularia spp. (Sand-Spurries)
Spergula spp.
Spermacoce spp. (False Buttonweeds)
Spermacoce verticillata (shrubby false buttonweed)
Sphaeralcea ambigua (apricot globemallow)
Sphaeralcea coccinea (Scarlet Globemallow)
Sphaeralcea spp. (globemallows)
Sphaerolobium minus (globe-pea)
Sphaerolobium spp.
Sphaeropteris cooperi (Scaly Tree Fern)
Sphaeropteris spp.
Sphagneticola spp.
Sphagneticola trilobata (Trailing Daisy)
Sphagnum capillifolium (Northern Peatmoss)
Sphagnum denticulatum (Cow-horn Bog-moss)
Sphagnum fallax (Flat-top Bogmoss)
Sphagnum palustre (Prairie Peatmoss)
Sphagnum spp. (Sphagnum mosses)
Spigelia marilandica (Indian Pink)
Spigelia spp.
Spinacia spp.
Spinifex sericeus (Beach Spinifex)
Spinifex spp.
Spinulum annotinum (interrupted clubmoss)
Spinulum spp.
Spiraea alba (white meadowsweet)
Spiraea douglasii (western spirea)
Spiraea japonica (Japanese Spirea)
Spiraea japonica 'Goldflame' (Goldflame spirea)
Spiraea japonica 'Little Princess' (Little Princess spirea)
Spiraea lucida (Shinyleaf Spiraea)
Spiraea nipponica 'Snowmound' (snowmound spirea)
Spiraea splendens (Subalpine Spiraea)
Spiraea spp. (meadowsweets)
Spiraea thunbergii (Thunberg spirea)
Spiraea tomentosa (Steeplebush)
Spiraea × vanhouttei (Vanhoutte spirea)
Spiranthes australis (austral ladies'-tresses)
Spiranthes spiralis (Autumn Ladies' Tresses)
Spiranthes spp. (Ladies'-tresses)
Spiranthes × stellata (Starry Ladies'-Tresses)
Spiranthes vernalis (Spring Ladies' Tresses)
Sporobolus alterniflorus (Saltmarsh Cordgrass)
Sporobolus anglicus (common cordgrass)
Sporobolus heterolepis (Prairie Dropseed)
Sporobolus spp. (dropseeds, cordgrasses, and sandreeds)
Sporobolus wrightii (Giant Sacaton)
Sprengelia incarnata (Pink Swamp Heath)
Sprengelia spp.
Spyridium globulosum (basket bush)
Spyridium parvifolium (Australian dusty miller)
Spyridium spp.
Stachys bullata (California Hedge Nettle)
Stachys byzantina (lamb's ears)
Stachys chamissonis (Coastal Hedge-nettle)
Stachys floridana (Florida Hedgenettle)
Stachys officinalis (wood betony)
Stachys palustris (Marsh Woundwort)
Stachys rigida (Rough Hedgenettle)
Stachys spp. (Hedgenettles)
Stachys sylvatica (hedge woundwort)
Stachytarpheta spp. (Porterweeds)
Stackhousia monogyna (Creamy Candles)
Stackhousia spp.
Stackhousia viminea (Yellow Stackhousia)
Stanleya pinnata (Desert Prince's Plume)
Stanleya spp.
Staphylea spp.
Staphylea trifolia (American bladdernut)
Staurastrum spp.
Stelis spp. (Leach Orchids)
Stellaria alsine (Bog Stitchwort)
Stellaria aquatica (Water Chickweed)
Stellaria flaccida (Forest Starwort)
Stellaria graminea (lesser stitchwort)
Stellaria media (chickweed)
Stellaria pubera (star chickweed)
Stellaria pungens (prickly starwort)
Stellaria spp. (chickweeds)
Stenanthera conostephioides (Flame Heath)
Stenanthera pinifolia (pine heath)
Stenanthera spp.
Stenaria nigricans (diamond-flowers)
Stenaria spp.
Stenocarpus sinuatus (Firewheel tree)
Stenocarpus spp.
Stenocereus spp. (Pitayas)
Stenotaphrum secundatum (St. Augustine Grass)
Stenotaphrum spp.
Stephania japonica (Tapevine)
Stephania spp.
Stephanomeria diegensis (San Diego Wirelettuce)
Stephanomeria pauciflora (Brownplume Wirelettuce)
Stephanomeria spp. (Wirelettuces)
Stevia rebaudiana (Stevia)
Stevia spp.
Stewartia monadelpha (tall stewartia)
Stewartia pseudocamellia (Japanese stewartia)
Stewartia spp.
Sticherus flabellatus (Shiny fan fern)
Sticherus spp.
Stillingia spp.
Stillingia texana (Texas Stillingia)
Stipa gigantea (giant feather grass)
Stipa spp. (Needle Grasses)
Stipa tenuissima
Strelitzia nicolai (Giant Bird of Paradise)
Strelitzia reginae (Bird of Paradise)
Strelitzia spp. (Bird-of-paradise flowers)
Streptanthus spp.
Streptanthus tortuosus (Mountain Jewelflower)
Streptocarpus spp. (African Primrose)
Streptopus amplexifolius (white twisted-stalk)
Streptopus lanceolatus (rose twisted-stalk)
Streptopus spp.
Strobilanthes spp. (Coneflowers)
Stromanthe spp.
Strophostyles helvola (trailing fuzzy-bean)
Strophostyles spp.
Struthiola spp. (capesprays)
Struthiopteris spicant (deer fern)
Struthiopteris spp.
Stylidium armeria (Thrift-leaved Triggerplant)
Stylidium graminifolium (Grass Triggerplant)
Stylidium spp. (Triggerplants)
Stylosanthes biflora (sidebeak pencilflower)
Stylosanthes spp.
Stypandra glauca (nodding blue lily)
Stypandra spp.
Styphelia ericoides (Bearded Heath)
Styphelia humifusa (Cranberry Heath)
Styphelia sieberi (Prickly Beard-heath)
Styphelia spp.
Styphnolobium affine (Eve's Necklacepod)
Styphnolobium japonicum (Japanese pagoda tree)
Styphnolobium spp.
Styrax japonicus (Japanese snowdrop tree)
Styrax obassia (fragrant snowbell)
Styrax spp.
Suaeda australis (Austral Seablite)
Suaeda maritima (Herbaceous Seepweed)
Suaeda spp. (Seepweeds)
Suaeda vera (Shrubby Seablite)
Succisa pratensis (Devil's-bit Scabious)
Succisa spp.
Sutera (Bacopa)
Swainsona formosa (Sturt's Desert Pea)
Swainsona galegifolia (Smooth Darling Pea)
Swainsona lessertiifolia (coast Swainson-pea)
Swainsona spp.
Syagrus romanzoffiana (Queen Palm)
Syagrus spp.
Symphoricarpos albus (snowberry)
Symphoricarpos mollis (Creeping Snowberry)
Symphoricarpos occidentalis (Western Snowberry)
Symphoricarpos orbiculatus (coralberry)
Symphoricarpos rotundifolius (Roundleaf Snowberry)
Symphoricarpos spp. (snowberries)
Symphyotrichum chilense (Pacific Aster)
Symphyotrichum cordifolium (Common Blue Wood Aster)
Symphyotrichum divaricatum (southern annual saltmarsh aster)
Symphyotrichum drummondii (Drummond's aster)
Symphyotrichum ericoides (white heath aster)
Symphyotrichum laeve (smooth blue aster)
Symphyotrichum lanceolatum (panicled aster)
Symphyotrichum novae-angliae (New England aster)
Symphyotrichum novi-belgii (New York aster)
Symphyotrichum oblongifolium (Aromatic Aster)
Symphyotrichum patens (late purple aster)
Symphyotrichum pilosum (hairy white oldfield aster)
Symphyotrichum puniceum (swamp aster)
Symphyotrichum racemosum (Small White Aster)
Symphyotrichum shortii (Short's aster)
Symphyotrichum spathulatum (Western Mountain Aster)
Symphyotrichum spp. (American asters)
Symphyotrichum subspicatum (Douglas' aster)
Symphytum grandiflorum (Creeping Comfrey)
Symphytum officinale (common comfrey)
Symphytum orientale (Soft Comfrey)
Symphytum tuberosum (Tuberous Comfrey)
Symplocarpus foetidus (Eastern Skunk Cabbage)
Symplocarpus spp.
Symplocos spp.
Symplocos tinctoria (Sweetleaf)
Syncarpia glomulifera (Turpentine)
Syncarpia spp.
Syngonium podophyllum (Arrowhead Plant)
Syngonium spp. (Arrow-head Vines)
Synoum glandulosum (scentless rosewood)
Synoum spp.
Synsepalum dulcificum (Miracle Fruit)
Synsepalum spp.
Syntrichia montana (Intermediate Screw-moss)
Syntrichia ruraliformis (Sand-hill Screw-moss)
Syntrichia ruralis (Star Moss)
Syntrichia spp.
Syringa meyeri 'Palibin' (Dwarf Korean Lilac)
Syringa pubescens ssp. patula 'Miss Kim' (Miss Kim lilac)
Syringa reticulata (Japanese Tree Lilac)
Syringa spp. (Lilacs)
Syringa vulgaris (lilac, common lilac)
Syzygium australe (scrub cherry)
Syzygium floribundum (weeping lilli pilli)
Syzygium oleosum (Blue Lilly Pilly)
Syzygium smithii (Lilly Pilly)
Syzygium spp. (Waterberries)
Tabebuia spp. (Trumpet trees)
Tabernaemontana pandacaqui (Banana Bush)
Tabernaemontana spp.
Tacca chantrieri (Black Bat Flower)
Tacca spp.
Tagetes erecta (Mexican Marigold)
Tagetes minuta (wild marigold)
Tagetes patula (French marigold)
Tagetes spp. (Marigolds)
Tamala palustris (swamp redbay)
Tamala spp.
Tamarix gallica (French tamarisk)
Tamarix ramosissima (saltcedar)
Tamarix spp. (Tamarisks)
Tanacetum parthenium (feverfew)
Tanacetum spp. (tansies)
Tanacetum vulgare (common tansy)
Taraxacum erythrospermum (red-seeded dandelion)
Taraxacum officinale (Dandelion Greens)
Taraxacum spp. (dandelions)
Taraxia ovata (Sun Cup)
Taraxia spp.
Tasmannia insipida (Brush Pepperbush)
Tasmannia lanceolata (Mountain Pepper)
Tasmannia spp.
Taxodium ascendens (pondcypress)
Taxodium distichum (bald cypress)
Taxodium spp. (baldcypresses)
Taxus baccata (English yew)
Taxus baccata 'Fastigiata' (Irish Yew)
Taxus baccata 'Fastigiata Aurea' (Golden Irish Yew)
Taxus baccata 'Repandens' (Spreading English Yew)
Taxus brevifolia (Pacific yew)
Taxus canadensis (Canada yew)
Taxus cuspidata (Japanese yew)
Taxus cuspidata 'Nana' (Dwarf Japanese yew)
Taxus × media 'Hicksii' (Hicks yew)
Taxus spp. (yews)
Tecomaria capensis (Cape Honeysuckle)
Tecomaria spp.
Tecoma spp.
Tecoma x 'Orange Jubilee' (Orange Jubilee Tecoma)
Tectaria spp.
Tellima grandiflora (Fringecup)
Tellima spp.
Telmatoblechnum serrulatum (toothed midsorus fern)
Telmatoblechnum spp.
Telopea speciosissima (Waratah)
Telopea spp.
Telopea truncata (Tasmanian Waratah)
Templetonia retusa (Cockies Tongue)
Templetonia spp.
Tephrosia spp. (Hoarypeas)
Tephrosia virginiana (goat's rue)
Terminalia catappa (Sea Almond)
Terminalia spp. (Cluster-leafs)
Tetragonia implexicoma (bower spinach)
Tetragonia spp. (Seacorals)
Tetragonia tetragonoides (New Zealand Spinach)
Tetraneuris linearifolia (Fineleaf Four-nerved Daisy)
Tetraneuris scaposa (Stemmy Four-nerved Daisy)
Tetraneuris spp. (Four-nerved Daisies)
Tetrarrhena juncea (Forest Wire-grass)
Tetrarrhena spp.
Tetrastigma nitens (Native Grape)
Tetrastigma spp.
Tetratheca ciliata (Pink-bells)
Tetratheca pilosa (Hairy Pink-bells)
Tetratheca spp.
Tetratheca thymifolia (Thyme Pink-bells)
Teucrium canadense (American germander)
Teucrium chamaedrys (Wall Germander)
Teucrium fruticans
Teucrium scorodonia (woodland germander)
Teucrium spp. (Woodsages)
Thalictrum aquilegiifolium (Columbine Meadow Rue)
Thalictrum 'Black Stockings' (Black Stockings meadow rue)
Thalictrum dasycarpum (purple meadow-rue)
Thalictrum delavayi (Yunnan Meadow Rue)
Thalictrum dioicum (early meadow-rue)
Thalictrum fendleri (Torrey's Meadow-Rue)
Thalictrum flavum ssp. glaucum (Yellow Meadow Rue)
Thalictrum minus (Lesser Meadow-rue)
Thalictrum occidentale (Western Meadow-Rue)
Thalictrum polycarpum (Tall Meadow-rue)
Thalictrum pubescens (tall meadow-rue)
Thalictrum spp. (meadow-rues)
Thalictrum thalictroides (rue anemone)
Thamnobryum alopecurum (Fox-tail Feather-moss)
Thamnobryum spp.
Thamnochortus spp. (Thatching Reeds)
Thaumatophyllum bipinnatifidum (Split-Leaf Philodendron)
Thaumatophyllum spp.
Thelesperma filifolium (stiff greenthread)
Thelesperma spp.
Thelionema caespitosum (Tufted Blue Lily)
Thelionema spp.
Thelymitra antennifera (lemon-scented sun orchid)
Thelymitra crinita (Blue Lady Orchid)
Thelymitra ixioides (spotted sun-orchid)
Thelymitra megacalyptra (plains sun orchid)
Thelymitra peniculata (trim sun orchid)
Thelymitra rubra (salmon sun-orchid)
Thelymitra spp. (Sun Orchids)
Thelypteris palustris (marsh fern)
Thelypteris spp.
Themeda spp.
Themeda triandra (Kangaroo Grass)
Thermopsis montana (Mountain goldenbean)
Thermopsis spp. (Goldenbanners)
Thesium spp. (Rootthugs)
Thlaspi arvense (field penny-cress)
Thlaspi spp.
Thomasia petalocalyx (paper flower)
Thomasia spp.
Threlkeldia diffusa (Coast Bonefruit)
Threlkeldia spp.
Thuidiopsis sparsa (Sparse Fern Moss)
Thuidiopsis spp.
Thuidium delicatulum (delicate fern moss)
Thuidium spp. (fern mosses)
Thuidium tamariscinum (Common Tamarisk-moss)
Thuja koraiensis (Blue Korean Arborvitae)
Thuja occidentalis 'Degroot's Spire' (Degroot's Spire Thuja)
Thuja occidentalis 'Hetz Midget' (Hetz Midget Arborvitae)
Thuja occidentalis 'Smaragd' (Emerald Green Arborvitae)
Thuja plicata (western red cedar)
Thuja plicata 'Zebrina' (golden western red cedar)
Thuja × soeegaardii ('Green Giant' arborvitae)
Thuja spp. (arborvitaes)
Thujopsis dolabrata (Japanese false arborvitae)
Thujopsis dolabrata 'Variegata' (variegated Japanese false arborvitae)
Thujopsis spp.
Thunbergia alata (black-eyed Susan vine)
Thunbergia grandiflora (Sky Vine)
Thunbergia spp. (Clockvines)
Thymophylla pentachaeta (Parralena)
Thymophylla spp. (Pricklyleaves)
Thymus × citriodorus (Lemon Thyme)
Thymus praecox (Mother of Thyme)
Thymus praecox 'Coccineus' (Red Creeping Thyme)
Thymus pseudolanuginosus (Woolly Thyme)
Thymus serpyllum (Wild Thyme)
Thymus serpyllum 'Albus' (White Creeping Thyme)
Thymus serpyllum 'Elfin' (Elfin Creeping Thyme)
Thymus spp. (Thymes)
Thysanocarpus curvipes (sand fringepod)
Thysanocarpus spp.
Thysanotus patersonii (Twining Fringe-lily)
Thysanotus spp.
Thysanotus tuberosus (Common Fringe-lily)
Tiarella cordifolia (Foamflower)
Tiarella cordifolia 'Brandywine' (Brandywine Foamflower)
Tiarella cordifolia 'Oakleaf' (Oakleaf Foamflower)
Tiarella cordifolia 'Running Tapestry' (Running Tapestry Foamflower)
Tiarella spp. (foamflowers)
Tiarella stolonifera (Creeping Foamflower)
Tiarella trifoliata (foamflower)
Tibouchina spp. (glory bushes and allies)
Tibouchina urvilleana (Tibouchina Princess Flower)
Tigridia pavonia (Mexican shell flower)
Tigridia spp.
Tilia americana (basswood)
Tilia cordata (little‑leaf linden)
Tilia platyphyllos (Bigleaf Linden)
Tilia spp. (lindens, basswoods, and lime trees)
Tillandsia fasciculata (cardinal airplant)
Tillandsia × floridana (Florida airplant)
Tillandsia recurvata (ballmoss)
Tillandsia spp. (Air Plant)
Tillandsia usneoides (Spanish moss)
Tillandsia utriculata (giant airplant)
Tinantia anomala (False dayflower)
Tinantia spp.
Tipularia discolor (crane-fly orchid)
Tipularia spp.
Tithonia spp. (Mexican Sunflowers)
Todea barbara (king fern)
Todea spp.
Tolmiea menziesii (piggy-back plant)
Tolmiea spp.
Toona ciliata (Australian Red Cedar)
Toona spp.
Torenia spp. (wishbone flowers)
Torilis arvensis (common hedge parsley)
Torilis japonica (upright hedge-parsley)
Torilis spp. (hedge parslies)
Torminalis glaberrima (Wild Service-tree)
Torminalis spp.
Tortula muralis (Wall Screw-moss)
Tortula spp.
Toxicodendron diversilobum (Pacific poison oak)
Toxicodendron radicans (Poison Ivy)
Toxicodendron rydbergii (western poison ivy)
Toxicodendron spp. (poison ivies and oaks)
Toxicodendron vernix (poison sumac)
Toxicoscordion fremontii (Fremont's Death Camas)
Toxicoscordion paniculatum (foothill deathcamas)
Toxicoscordion spp. (Deathcamas)
Toxicoscordion venenosum (Meadow Deathcamas)
Trachelospermum asiaticum (Asiatic Jasmine)
Trachelospermum jasminoides (star jasmine)
Trachelospermum spp.
Trachyandra spp. (Capespinachs)
Trachycarpus fortunei (windmill palm)
Trachycarpus spp.
Trachymene incisa (Australian parsnip)
Trachymene spp.
Trachystemon orientalis (giant borage)
Trachystemon spp.
Tradescantia fluminensis (small-leaf spiderwort)
Tradescantia occidentalis (Western Spiderwort)
Tradescantia ohiensis (Ohio spiderwort)
Tradescantia pallida (Purple Heart)
Tradescantia spathacea (Moses-in-the-Cradle)
Tradescantia spp. (Spiderworts)
Tradescantia subaspera (Zigzag Spiderwort)
Tradescantia virginiana (Virginia spiderwort)
Tradescantia zebrina (Inch Plant)
Tragia spp. (noseburns)
Tragopogon dubius (Yellow Salsify)
Tragopogon porrifolius (purple salsify)
Tragopogon pratensis (meadow salsify)
Tragopogon spp. (Salsifies)
Trema spp.
Trema tomentosum (Nettle Tree)
Trentepohlia spp.
Triadica sebifera (Chinese Tallow)
Triadica spp.
Tribulus spp. (Devil Thorns)
Tribulus terrestris (puncture vine)
Trichocereus spp.
Trichodesma spp.
Trichodesma zeylanicum (camel bush)
Trichomanes spp.
Trichomanes venosum (veined bristle-fern)
Trichophorum cespitosum (Tufted Bulrush)
Trichophorum spp.
Trichostema dichotomum (Blue Curls)
Trichostema lanatum (woolly bluecurls)
Trichostema lanceolatum (Vinegar Weed)
Trichostema spp.
Tricoryne elatior (yellow rush-lily)
Tricoryne spp.
Tridax procumbens (Tridax Daisy)
Tridax spp.
Tridens flavus (purpletop tridens)
Tridens spp.
Trifolium angustifolium (Narrow-leaved clover)
Trifolium arvense (rabbitfoot clover)
Trifolium campestre (hop trefoil)
Trifolium dubium (Lesser hop trefoil)
Trifolium fragiferum (Strawberry clover)
Trifolium hirtum (Rose Clover)
Trifolium hybridum (Alsike clover)
Trifolium incarnatum (crimson clover)
Trifolium medium (Zigzag Clover)
Trifolium pratense (red clover)
Trifolium repens (white clover)
Trifolium spp. (clovers)
Trifolium willdenovii (tomcat clover)
Triglochin maritima (common arrowgrass)
Triglochin spp.
Trillium catesbaei (bashful wakerobin)
Trillium cernuum (nodding trillium)
Trillium chloropetalum (giant trillium)
Trillium cuneatum (Little Sweet Betsy)
Trillium decipiens
Trillium erectum (red trillium)
Trillium flexipes (drooping trillium)
Trillium grandiflorum (large white trillium)
Trillium kurabayashii (giant purple wakerobin)
Trillium luteum (Yellow Trillium)
Trillium ovatum (western trillium)
Trillium pusillum (Dwarf Trillium)
Trillium recurvatum (Prairie Trillium)
Trillium sessile (toadshade)
Trillium spp. (trilliums)
Trillium undulatum (painted trillium)
Trimezia spp. (Walking Irises)
Triodanis biflora (Venus's looking-glass)
Triodanis perfoliata (clasping Venus's looking glass)
Triodanis spp. (Venus' Looking-Glasses)
Tripladenia cunninghamii (kreysigia)
Tripladenia spp.
Tripleurospermum inodorum (scentless mayweed)
Tripleurospermum maritimum (Sea Mayweed)
Tripleurospermum spp.
Tripolium pannonicum (Sea Aster)
Tripolium spp.
Tripsacum dactyloides (eastern gamagrass)
Tripsacum spp.
Triquetrella papillata
Triquetrella spp.
Tristaniopsis laurina (Water Gum)
Tristaniopsis spp.
Triteleia grandiflora (large-flowered triteleia)
Triteleia hyacinthina (White Brodiaea)
Triteleia ixioides (Prettyface)
Triteleia laxa (Ithuriel's Spear)
Triteleia spp.
Triticum aestivum (Bread Wheat)
Triticum spp.
Triumfetta spp. (Burweeds)
Trixis californica (American threefold)
Trixis spp.
Trochocarpa laurina (Tree Heath)
Trochocarpa spp.
Trochodendron aralioides
Trochodendron spp.
Trollius spp.
Tropaeolum majus (garden nasturtium)
Tropaeolum spp. (Nasturtiums)
Tsuga canadensis (eastern hemlock)
Tsuga canadensis 'Pendula' (Weeping Canadian Hemlock)
Tsuga heterophylla (western hemlock)
Tsuga mertensiana (mountain hemlock)
Tsuga spp. (hemlocks)
Tulbaghia spp. (Wild Garlics)
Tulbaghia violacea (society garlic)
Tulipa (tulips)
Tulipa gesneriana (Garden Tulip)
Tulipa 'Groenland'
Tulipa 'Little Beauty'
Tulipa praestans (excellent tulip)
Tulipa 'Purple Prince'
Tulipa 'Strong Gold'
Turnera spp.
Turritis glabra (Tower Mustard)
Turritis spp.
Tussilago farfara (colt's-foot)
Tussilago spp.
Typha angustifolia (slender-leaved cattail)
Typha domingensis (southern cattail)
Typha × glauca (hybrid cattail)
Typha latifolia (common cat-tail)
Typha orientalis (Oriental Cattail)
Typha spp. (Cattails)
Ulex gallii (Western Gorse)
Ulex minor (Dwarf Gorse)
Ulex spp. (Gorses)
Ulmus alata (Winged Elm)
Ulmus americana (American Elm)
Ulmus americana 'Princeton' (Princeton American Elm Tree)
Ulmus crassifolia (Cedar Elm)
Ulmus × elegantissima 'Jacqueline Hillier' (Jacqueline Hillier Elm Tree)
Ulmus 'Frontier' (Frontier Elm Tree)
Ulmus glabra 'Camperdownii' (Camperdown elm)
Ulmus minor (Field Elm)
Ulmus parvifolia (Lacebark Chinese Elm Tree)
Ulmus procera (English elm)
Ulmus pumila (Siberian elm)
Ulmus rubra (slippery elm)
Ulmus spp. (elms)
Ulota crispa (crisped pincushion)
Ulota spp.
Ulva intestinalis (Gutweed)
Ulva lactuca (Broadleaf Sea Lettuce)
Ulva spp. (Sea Lettuces)
Umbellularia californica (California bay)
Umbellularia spp.
Umbilicus rupestris (Wall Pennywort)
Umbilicus spp. (Navelworts)
Ungnadia speciosa (Mexican buckeye)
Ungnadia spp.
Uniola paniculata (sea oats)
Uniola spp.
Urena lobata (Caesar weed)
Urena spp.
Urera spp.
Uropappus lindleyi (silverpuffs)
Uropappus spp.
Ursinia spp. (Paraseeds)
Urtica dioica (stinging nettle)
Urtica gracilis (slender stinging nettle)
Urtica incisa (Scrub Nettle)
Urtica spp. (nettles)
Urtica urens (small nettle)
Utricularia dichotoma (fairy aprons)
Utricularia × neglecta (Yellow bladderwort)
Utricularia spp. (Bladderworts)
Uvularia grandiflora (largeflower bellwort)
Uvularia perfoliata (Perfoliate Bellwort)
Uvularia sessilifolia (sessile bellwort)
Uvularia spp.
Vaccinium angustifolium (lowbush blueberry)
Vaccinium arboreum (sparkleberry)
Vaccinium corymbosum (blueberry)
Vaccinium elliottii (mayberry)
Vaccinium fuscatum (Black Highbush Blueberry)
Vaccinium macrocarpon (American Cranberry)
Vaccinium membranaceum (Black Huckleberry)
Vaccinium myrsinites (Shiny blueberry)
Vaccinium myrtillus (common bilberry)
Vaccinium ovalifolium (Oval-leaf Huckleberry)
Vaccinium ovatum (evergreen huckleberry)
Vaccinium oxycoccos (bog cranberry)
Vaccinium pallidum (Early Lowbush Blueberry)
Vaccinium parvifolium (red huckleberry)
Vaccinium spp. (blueberries, cranberries, and allies)
Vaccinium stamineum (deerberry)
Vaccinium uliginosum (bog bilberry)
Vaccinium vitis-idaea (Lingonberry)
Vachellia farnesiana (Sweet acacia)
Vachellia spp. (thorn trees)
Valeriana dioica (Marsh Valerian)
Valeriana officinalis (common valerian)
Valeriana sitchensis (Sitka valerian)
Valeriana spp. (valerians)
Valerianella locusta (common cornsalad)
Valerianella radiata (beaked cornsalad)
Valerianella spp. (Cornsalads)
Vancouveria hexandra (inside-out flower)
Vancouveria spp.
Vanilla planifolia (Vanilla Orchid)
Vanilla spp.
Veratrum californicum (Corn Lily)
Veratrum nigrum
Veratrum spp. (false hellebores)
Veratrum viride (green false hellebore)
Verbascum blattaria (moth mullein)
Verbascum bombyciferum (white felted mullein)
Verbascum chaixii 'Album'
Verbascum chaixii 'Wedding Candles' (Wedding Candles Mullein)
Verbascum nigrum (Dark Mullein)
Verbascum olympicum (Olympic mullein)
Verbascum phoeniceum (purple verbascum)
Verbascum × 'Plum Smokey' (Plum Smokey Mullein)
Verbascum roripifolium (Watercress-Leaved Mullein)
Verbascum 'Southern Charm' (Southern Charm verbascum)
Verbascum spp. (mulleins)
Verbascum thapsus (common mullein)
Verbascum virgatum (Wand Mullein)
Verbena bonariensis (tall verbena, Brazilian verbena)
Verbena bracteata (Bigbract Verbena)
Verbena brasiliensis (Brazilian Vervain)
Verbena canadensis 'Homestead Purple' (Verbena Purple Homestead)
Verbena canescens (Woolly Vervain)
Verbena halei (Texas vervain)
Verbena hastata (Blue Vervain)
Verbena lasiostachys (western vervain)
Verbena officinalis (Common vervain)
Verbena rigida (Rigid Verbena)
Verbena spp. (vervains)
Verbena stricta (hoary vervain)
Verbena urticifolia (white vervain)
Verbesina alternifolia (Wingstem)
Verbesina encelioides (cowpen daisy)
Verbesina occidentalis (Yellow Crownbeard)
Verbesina spp. (crownbeards)
Verbesina virginica (frostweed)
Vernonia baldwinii (Western Ironweed)
Vernonia gigantea (Tall Ironweed)
Vernonia missurica (Missouri Ironweed)
Vernonia noveboracensis (New York Ironweed)
Vernonia spp. (ironweeds)
Veronica americana (American brooklime)
Veronica anagallis-aquatica (blue water-speedwell)
Veronica arvensis (corn speedwell)
Veronica beccabunga (Brooklime)
Veronica chamaedrys (Germander Speedwell)
Veronica filiformis (Slender speedwell)
Veronica × franciscana (Hedge Veronica)
Veronica gracilis (Slender Speedwell)
Veronica hederifolia (Ivy-leaved Speedwell)
Veronica montana (Wood Speedwell)
Veronica odora (boxleaf hebe)
Veronica officinalis (heath speedwell)
Veronica peduncularis 'Georgia Blue' (Georgia Blue Speedwell)
Veronica peregrina (Purslane Speedwell)
Veronica persica (bird's-eye speedwell)
Veronica plebeia (Australian Speedwell)
Veronica polita (Grey Field-speedwell)
Veronica serpyllifolia (thyme-leaved speedwell)
Veronica speciosa (New Zealand hebe)
Veronica spicata (veronica, speedwell)
Veronica spicata 'Royal Candles' (Royal Candles Speedwell)
Veronica spp. (speedwells)
Veronica ssp. (hebe)
Veronicastrum spp.
Veronicastrum virginicum (culver's root)
Veronica sublobata (Pink Ivy-leaved Speedwell)
Veronica × 'Tidal Pool' (Tidal Pool Speedwell)
Veronica topiaria (Topiary Hebe)
Vertebrata lanosa (Wrack Siphon Weed)
Vertebrata spp.
Viburnum acerifolium (mapleleaf viburnum)
Viburnum × bodnantense 'Dawn' (Dawn viburnum)
Viburnum × burkwoodii (Burkwood viburnum)
Viburnum carlesii (Korean spice viburnum)
Viburnum × carlocephalum (fragrant snowball viburnum)
Viburnum cassinoides (northern wild raisin)
Viburnum davidii (David viburnum)
Viburnum dentatum (southern arrowwood)
Viburnum dilatatum (linden viburnum)
Viburnum ellipticum (Oval-leaf Viburnum)
Viburnum lantana (Wayfaring-tree)
Viburnum lantanoides (hobblebush)
Viburnum lentago (nannyberry)
Viburnum opulus 'Nanum' (dwarf European cranberry bush)
Viburnum opulus 'Roseum' (European cranberry bush)
Viburnum opulus var. americanum (American cranberry bush)
Viburnum plicatum (Japanese Snowball Bush)
Viburnum plicatum f. tomentosum (doublefile viburnum)
Viburnum prunifolium (Blackhaw)
Viburnum recognitum (northern arrowwood)
Viburnum × rhytidophylloides (lantanaphyllum viburnum)
Viburnum rhytidophyllum (leatherleaf viburnum)
Viburnum rufidulum (Rusty Blackhaw)
Viburnum spp. (viburnums)
Viburnum tinus (Viburnum tinus)
Viburnum x burkwoodii (Burkwood Viburnum)
Vicia caroliniana (Carolina Vetch)
Vicia cracca (tufted vetch)
Vicia ludoviciana (slender vetch)
Vicia sepium (Bush Vetch)
Vicia spp. (Vetches)
Vicia tetrasperma (Lentil Vetch)
Vicia villosa (woolly vetch)
Vigna luteola (Wild Cowpea)
Vigna spp.
Viguiera dentata (Toothleaf Goldeneye)
Viguiera spp.
Viminaria juncea (native broom)
Viminaria spp.
Vinca difformis (Intermediate Periwinkle)
Vinca major (Greater Periwinkle)
Vinca major 'Variegata' (variegated vinca major)
Vinca minor (common periwinkle)
Vinca spp. (periwinkles)
Vincetoxicum spp. (dog-strangling vines)
Vinealobryum insulanum (Cylindric Beard-moss)
Vinealobryum spp.
Viola adunca (Early Blue Violet)
Viola arvensis (European field pansy)
Viola banksii (Banks' Violet)
Viola betonicifolia (Mountain Violet)
Viola blanda (sweet white violet)
Viola canadensis (Canada Violet)
Viola communis (dooryard violet)
Viola cucullata (marsh blue violet)
Viola eriocarpa (Smooth Yellow Violet)
Viola glabella (Stream Violet)
Viola hastata (Halberd-leaved violet)
Viola hederacea (Ivy Leaved Violet)
Viola hirta (Hairy Violet)
Viola labradorica (Labrador violet)
Viola lutea (Mountain Pansy)
Viola minuscula (northern white violet)
Viola missouriensis (Missouri Violet)
Viola odorata (Sweet violet)
Viola palmata (three-lobed violet)
Viola palustris (Marsh Violet)
Viola pedata (bird's foot violet)
Viola pedunculata (California Golden Violet)
Viola praemorsa (Prairie Violet)
Viola primulifolia (primrose-leaved violet)
Viola purpurea (Goosefoot violet)
Viola rafinesquei (American field pansy)
Viola reichenbachiana (Early Dog-violet)
Viola riviniana (common dog-violet)
Viola rostrata (Long-spurred violet)
Viola rotundifolia (Round-leaved Violet)
Viola sempervirens (Evergreen Yellow Violet)
Viola striata (cream violet)
Viola tricolor (Wild Pansy)
Viola × williamsii (Horned pansy)
Viola × wittrockiana (pansy)
Viscum album (European mistletoe)
Viscum spp.
Vitex agnus-castus (chaste tree)
Vitex spp. (Chastetrees)
Vitis aestivalis (summer grape)
Vitis californica (California wild grape)
Vitis cinerea (graybark grape)
Vitis labrusca (fox grape)
Vitis mustangensis (mustang grape)
Vitis riparia (riverbank grape)
Vitis rotundifolia (muscadine)
Vitis spp. (grapevines)
Vitis vinifera (grape)
Vitis vulpina (frost grape)
Vittadinia cuneata (Purple Fuzzweed)
Vittadinia gracilis (Purple Fuzzweed)
Vittadinia spp.
Vriesea spp.
Wahlenbergia gracilis (Australian Bluebell)
Wahlenbergia spp. (Capebells)
Wahlenbergia stricta (Australian bluebell)
Washingtonia filifera (California fan palm)
Washingtonia robusta (Mexican Fan Palm)
Washingtonia spp. (Fan Palms)
Watsonia meriana (Bulbil Bugle-lily)
Watsonia spp. (Watsonias)
Wedelia hispida (Texas creeping-oxeye)
Wedelia spp.
Weigela florida (weigela)
Weigela florida 'Variegata' (variegated weigela)
Weigela spp. (Weigela bushes)
Westringia eremicola (slender westringia)
Westringia fruticosa (Coastal Rosemary)
Westringia longifolia
Westringia spp.
Whipplea modesta (modesty)
Whipplea spp.
Wikstroemia indica (Bootlace Plant)
Wikstroemia spp.
Wilkiea hugeliana (Common Wilkiea)
Wilkiea spp.
Wisteria floribunda (Japanese wisteria)
Wisteria sinensis (Chinese wisteria)
Wisteria spp. (wisterias)
Wodyetia bifurcata (Foxtail Palm Tree)
Wodyetia spp.
Wollemia nobilis (Wollemi pine)
Wollemia spp.
Woodsia obtusa (blunt woodsia)
Woodsia spp.
Woodwardia areolata (netted chain fern)
Woodwardia fimbriata (Giant Chain Fern)
Woodwardia spp.
Woodwardia virginica (Virginia chainfern)
Woollsia pungens (Snow Wreath)
Woollsia spp.
Wurmbea dioica (Early Nancy)
Wurmbea spp.
Wyethia amplexicaulis (Northern Mule's Ear)
Wyethia angustifolia (Narrow Leaf Mule Ears)
Wyethia mollis (woolly mule's ears)
Wyethia spp. (mule's ears)
Xanthisma spinulosum (Spiny Goldenweed)
Xanthisma spp.
Xanthium spp. (Cockleburs)
Xanthium strumarium (rough cocklebur)
Xanthocyparis spp.
Xanthorhiza simplicissima (Shrub Yellowroot)
Xanthorhiza spp.
Xanthorrhoea australis (Austral Grass-tree)
Xanthorrhoea glauca (Queensland Grasstree)
Xanthorrhoea johnsonii (Forest Grasstree)
Xanthorrhoea preissii (Balga)
Xanthorrhoea quadrangulata (Yacka)
Xanthorrhoea semiplana (tufted grass-tree)
Xanthorrhoea spp. (Grasstrees)
Xanthosia pilosa (Woolly Xanthosia)
Xanthosia spp.
Xanthosoma spp.
Xanthostemon chrysanthus (Golden Penda)
Xanthostemon spp.
Xerochrysum bracteatum (Golden Everlasting)
Xerochrysum spp.
Xerochrysum viscosum (sticky everlasting)
Xerophyllum spp.
Xerophyllum tenax (Beargrass)
Xylococcus bicolor (mission manzanita)
Xylococcus spp.
Xylomelum pyriforme (Woody Pear)
Xylomelum spp.
Xylorhiza orcuttii (Orcutt's Woodyaster)
Xylorhiza spp.
Xylorhiza tortifolia (Mojave Woodyaster)
Xyris spp. (Yellow-eyed Grasses)
Youngia japonica (Oriental false hawksbeard)
Youngia spp. (Youngia)
Yucca baccata (Banana Yucca)
Yucca brevifolia (Western Joshua Tree)
Yucca constricta (Buckley's Yucca)
Yucca elata (soaptree yucca)
Yucca filamentosa (yucca)
Yucca filamentosa 'Color Guard' (Color Guard Yucca)
Yucca glauca (Great Plains yucca)
Yucca gloriosa var. tristis (weeping yucca)
Yucca guatemalensis (Spineless Yucca)
Yucca jaegeriana (Eastern Joshua tree)
Yucca rupicola (Twisted-leaf Yucca)
Yucca schidigera (Mojave Yucca)
Yucca spp. (Yuccas)
Yucca treculiana (Spanish dagger)
Zamia furfuracea (Cardboard Palm Tree)
Zamia integrifolia (Coontie Palm)
Zamia spp.
Zamioculcas spp.
Zamioculcas zamiifolia (ZZ Plant)
Zamioculcas zamiifolia 'Raven' (Raven ZZ Plant)
Zamioculcas zamiifolia (variegated) (Variegated ZZ Plant)
Zantedeschia aethiopica (White Calla Lily)
Zantedeschia spp. (calla lilies)
Zanthoxylum americanum (northern prickly ash)
Zanthoxylum clava-herculis (Hercules' club)
Zanthoxylum spp. (prickly-ashes)
Zelkova serrata (sawleaf zelkova)
Zelkova spp.
Zeltnera spp.
Zeltnera venusta (California Centaury)
Zephyranthes atamasco (Atamasco Lily)
Zephyranthes chlorosolen (Brazos rain-lily)
Zephyranthes drummondii (Drummond's rain lily)
Zephyranthes spp. (Rain lilies)
Zieria smithii (Sandfly Zieria)
Zieria spp.
Zingiber officinale (Ginger)
Zingiber spp.
Zinnia elegans (Elegant Zinnia)
Zinnia spp. (Zinnias)
Zizia aurea (Golden Alexanders)
Zizia spp. (Alexanders)
Ziziphus spp. (Jujubes)
Zoysia japonica (Zoysia Grass)
Zoysia spp.