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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)
Abeliophyllum distichum (White Forsythia)
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)
Acacia dealbata (Silver wattle)
Acacia melanoxylon (blackwood)
Acaena novae-zelandiae (Biddy-biddy)
Acanthocereus tetragonus (Fairy Castle Cactus)
Acanthus mollis (bear's breech)
Acanthus spinosus (Spiny Bear's Breeches)
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 × freemanii 'Jeffersred' (Autumn Flame Maple)
Acer griseum (paperbark maple)
Acer macrophyllum (bigleaf maple)
Acer negundo (Box Elder)
Acer palmatum (Japanese maple)
Acer palmatum 'Atropurpureum' (red Japanese maple)
Acer palmatum 'Red Dragon' (Red Dragon Japanese Maple)
Acer palmatum 'Seiryû' (Seiryu Japanese Maple)
Acer palmatum 'Shaina' (Shaina 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 'Wolff' (Wolff Japanese Maple)
Acer pensylvanicum (striped maple)
Acer pictum (Painted Maple)
Acer platanoides (Norway maple)
Acer platanoides 'Crimson King' (Crimson King maple)
Acer pseudoplatanus (sycamore maple)
Acer pseudosieboldianum (Korean Maple)
Acer rubrum (red maple)
Acer saccharinum (silver maple)
Acer saccharum (sugar maple)
Acer shirasawanum 'Aureum' (Golden Full Moon Maple)
Acer shirasawanum 'Autumn Moon' (Autumn Moon Maple)
Acer sieboldianum (Siebold Maple)
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 ptarmica (Sneezewort)
Achlys triphylla (vanilla-leaf)
Acmispon glaber (deerweed)
Aconitum carmichaelii (Azure Monkshood)
Aconitum columbianum (Columbian Monkshood)
Aconitum hemsleyanum (Climbing Monkshood)
Aconitum napellus (Common Monkshood)
Acorus gramineus 'Ogon' (Golden Variegated Sweet Flag)
Actaea pachypoda (White Baneberry)
Actaea racemosa (Black Cohosh)
Actaea rubra (red baneberry)
Actinidia deliciosa (kiwi)
Adenium obesum (Desert Rose)
Adenostoma fasciculatum (chamise)
Adiantum aleuticum (western maidenhair fern)
Adiantum capillus-veneris (black maidenhair fern)
Adiantum pedatum (Northern Maidenhair Fern)
Adiantum raddianum (Maidenhair Fern)
Adiantum venustum (Himalayan maidenhair fern)
Adonidia merrillii (Christmas Palm)
Adoxa moschatellina (Moschatel)
Aechmea fasciata (Silver Vase Bromeliad)
Aegopodium podagraria (Goutweed)
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 turbinata (Japanese Horse Chestnut)
Aethusa cynapium (Fool's parsley)
Agapanthus africanus (lily of the Nile)
Agapanthus praecox (blue lily)
Agastache foeniculum (Anise Hyssop)
Agastache rupestris (Sunset Hyssop)
Agastache spp. (hyssop)
Agave americana (Century Plant)
Agave attenuata (Fox Tail Agave)
Agave geminiflora (Twin Flower Agave Plant)
Agave vilmoriniana (Octopus Agave)
Agrimonia eupatoria (common agrimony)
Agrostemma githago (corn cockle)
Ailanthus altissima (tree of heaven)
Aira praecox (early hair grass)
Ajuga reptans (creeping bugleweed)
Akebia quinata (five-leaved akebia)
Albizia julibrissin (silk tree)
Alcea rosea (common hollyhock)
Alchemilla alpina (Alpine Lady's-mantle)
Alchemilla arvensis (Field Parsley Piert)
Alchemilla conjuncta (Silver Lady's Mantle)
Alchemilla mollis (Lady's Mantle)
Alchemilla vulgaris (Lady's-mantle)
Alisma plantago-aquatica (water-plantain)
Allamanda cathartica (Allamanda Vine)
Alliaria petiolata (garlic mustard)
Allium atropurpureum (Dark Purple Allium)
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 '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 fistulosum (Welsh Onion (Scallions))
Allium fistulosum 'Evergreen Hardy White' (Evergreen Hardy White Bunching Onion)
Allium 'Globemaster' (globemaster onion)
Allium moly (Golden Garlic)
Allium 'Mount Everest' (Mount Everest Allium)
Allium paradoxum (Few-flowered Leek)
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 sphaerocephalon (Drumstick Allium)
Allium triquetrum (Three-cornered garlic)
Allium tuberosum (Garlic Chives)
Allium unifolium (one-leaved onion)
Allium ursinum (Ramsons)
Allium vineale (wild garlic)
Alnus cordata (Italian alder)
Alnus glutinosa (common alder)
Alnus rubra (red alder)
Alocasia odora (Upright Elephant Ear)
Alocasia reginula (Black Velvet Alocasia)
Alocasia zebrina (Zebra Alocasia)
Aloe vera (Aloe Vera)
Alopecurus geniculatus (Marsh foxtail)
Alopecurus pratensis (Meadow Foxtail)
Amaryllis belladonna (Belladonna Lily)
Amauropelta noveboracensis (New York fern)
Amblystegium serpens (creeping feather-moss)
Ambrosia artemisiifolia (common ragweed)
Ambrosia psilostachya (western ragweed)
Ambrosia trifida (giant ragweed)
Amelanchier alnifolia (serviceberry)
Amelanchier arborea (common serviceberry)
Amelanchier ssp. (serviceberry)
Amorpha fruticosa (false indigo bush)
Ampelopsis glandulosa (Porcelain Berry)
Amphicarpaea bracteata (American hog-peanut)
Amsonia ciliata (Fringed Bluestar)
Amsonia hubrichtii (Arkansas Bluestar)
Amsonia illustris (Shining Bluestar)
Amsonia tabernaemontana (Eastern Bluestar)
Anacamptis morio (green-winged orchid)
Anacamptis pyramidalis (pyramidal orchid)
Ananas comosus (Pineapple Plant)
Anaphalis margaritacea (pearly everlasting)
Anaphalis triplinervis (Triple-Veined Pearly Everlasting)
Anasa tristis (Squash Bug)
Anchusa arvensis (small bugloss)
Anchusa azurea (Italian bugloss)
Anchusa officinalis (common bugloss)
Andropogon gerardi (big bluestem)
Andropogon gerardii (Big Bluestem)
Andropogon ternarius (Splitbeard Bluestem)
Andropogon virginicus (Broomsedge Bluestem)
Anemanthele lessoniana (New Zealand Wind Grass)
Anemonastrum canadense (Canada anemone)
Anemone blanda (windflower)
Anemone coronaria (poppy anemone)
Anemone nemorosa (wood anemone)
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)
Anemonopsis macrophylla (False Anemone)
Anethum graveolens (Dill)
Angelica gigas (Korean Angelica)
Angelica sylvestris (Wild Angelica)
Annona muricata (Soursop)
Annona squamosa (Sugar Apple)
Anthemis cotula (chamomile)
Anthoxanthum odoratum (sweet vernal grass)
Anthriscus cerefolium (Chervil)
Anthriscus sylvestris (wild chervil)
Anthurium andraeanum (Flamingo Flower)
Anthurium clarinervium (Velvet Cardboard Anthurium)
Anthyllis vulneraria (Common Kidney-Vetch)
Antirrhinum majus (snapdragon)
Apocynum cannabinum (hemp dogbane)
Aponogeton natans (floating water hawthorn)
Apopellia endiviifolia (Endive Pellia)
Aquilegia canadensis (Wild Columbine)
Aquilegia vulgaris (columbine)
Arabidopsis thaliana (mouse-ear cress)
Arachniodes simplicior (Variegated Holly Fern)
Aralia nudicaulis (wild sarsaparilla)
Araucaria araucana (Monkey Puzzle Tree)
Araucaria heterophylla (Norfolk Island Pine)
Arbutus menziesii (madrone)
Arbutus unedo (strawberry tree)
Arctium lappa (greater burdock)
Arctium minus (burrdock)
Arctium tomentosum (Woolly Burdock)
Arctostaphylos columbiana (hairy manzanita)
Arctostaphylos spp. (manzanita)
Arctostaphylos uva-ursi (kinnikinnick)
Arenaria serpyllifolia (Thyme-leaved Sandwort)
Argentina anserina (common silverweed)
Aria edulis (Whitebeam)
Arisaema candidissimum (White Jack-in-the-pulpit)
Arisaema consanguineum (Cobra Lily)
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)
Armeria maritima (sea thift)
Armoracia rusticana (Horseradish)
Arrhenatherum elatius (tall oat grass)
Artemisia abrotanum (Southernwood)
Artemisia californica (California sagebrush)
Artemisia dracunculus (French Tarragon)
Artemisia lactiflora (White Mugwort)
Artemisia ludoviciana (Silver Wormwood)
Artemisia pontica (Roman Wormwood)
Artemisia tridentata (Big Sagebrush)
Artemisia vulgaris (common mugwort)
Arthropodium candidum (White Rock Lily)
Arum italicum (lords and ladies)
Arum maculatum (Cuckoo-pint)
Aruncus dioicus (goatsbeard)
Arundo donax (giant reed)
Asarum caudatum (Wild Ginger)
Asarum europaeum (European Wild Ginger)
Asarum splendens (Chinese Wild Ginger)
Asclepias asperula (Antelopehorn Milkweed)
Asclepias curassavica (tropical milkweed)
Asclepias incarnata (Swamp Milkweed)
Asclepias syriaca (common milkweed)
Asclepias tuberosa (Butterfly Weed)
Asclepias verticillata (Whorled Milkweed)
Asclepias viridis (green antelopehorns)
Asimina triloba (Pawpaw)
Asparagus officinalis (wild asparagus)
Aspidistra elatior (Cast Iron Plant)
Asplenium adiantum-nigrum (black spleenwort)
Asplenium ceterach (Rustyback)
Asplenium marinum (sea spleenwort)
Asplenium nidus (Bird's Nest Fern)
Asplenium platyneuron (ebony spleenwort)
Asplenium ruta-muraria (wall-rue)
Asplenium scolopendrium (Harts Tongue Fern)
Asplenium trichomanes (Maidenhair Spleenwort)
Aster spp. (aster)
Astilbe spp. (astilbe)
Astrantia major (Great Masterwort)
Astrantia maxima (Large Masterwort)
Athyrium angustum (northern lady fern)
Athyrium filix-femina (lady fern)
Athyrium otophorum (Eared Lady Fern)
Atrichum undulatum (Catherine's moss)
Atriplex laciniata (Frosted Orache)
Atriplex littoralis (Grass-leaved Orache)
Atriplex patula (Common Orache)
Atriplex portulacoides (Sea-purslane)
Atriplex prostrata (Creeping Saltbush)
Atropa bella-donna (Deadly Nightshade)
Aubrieta deltoidea (purple rock cress)
Aucuba japonica (Japanese aucuba)
Aucuba japonica 'Gold Dust' (Gold Dust aucuba)
Avenella flexuosa (wavy hair-grass)
Azadirachta indica (Neem Tree)
Azara microphylla (Boxleaf azara)
Baccharis halimifolia (groundsel tree)
Baccharis salicifolia (mule fat)
Ballota nigra (Black Horehound)
Baptisia australis (Blue Wild Indigo)
Barbarea vulgaris (bitter wintercress)
Barbula unguiculata (Bird's-Claw Beard-Moss)
Beaucarnea recurvata (Ponytail Palm)
Beesia deltophylla (beesia)
Begonia grandis ssp. evansiana (Hardy Begonia)
Belamcanda chinensis (Blackberry Lily)
Bellis perennis (Lawn daisy)
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 japonica (Japanese Mahonia)
Berberis julianae (Wintergreen barberry)
Berberis nervosa (Oregon-grape)
Berberis repens (creeping mahonia)
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 verruculosa (Warty barberry)
Berberis x gladwynensis (Gladwyne barberry)
Berberis x gladwynensis 'William Penn' (William Penn barberry)
Bergenia ciliata (Frilly Bergenia)
Bergenia crassifolia (Heartleaf bergenia)
Bergenia spp. (bergenia)
Berteroa incana (hoary alyssum)
Berula erecta (cutleaf water parsnip)
Betonica officinalis (common hedge-nettle)
Betula alleghaniensis (Yellow 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 pubescens (Downy Birch)
Betula utilis ssp. jacquemontii (Himalayan white birch)
Bidens frondosa (Devil's Beggarticks)
Bigelowia nuttallii (Nuttall's Rayless Goldenrod)
Bismarckia nobilis (Bismarck Palm)
Bistorta amplexicaulis (red bistort)
Bistorta officinalis (common bistort)
Blackstonia perfoliata (Yellow-wort)
Blechnum penna-marina (Alpine Water Fern)
Boehmeria cylindrica (false nettle)
Bolboschoenus maritimus (sea clubrush)
Borago officinalis (borage)
Botrypus virginianus (rattlesnake fern)
Bougainvillea spectabilis (Bougainvillea)
Bouteloua curtipendula (Sideoats Grama)
Bouteloua gracilis (Blue Grama Grass)
Brachyglottis Dunedin Hybrid 'Sunshine' (Sunshine Daisy Bush)
Brachypodium sylvaticum (Slender False Brome)
Brachythecium albicans (Whitish Feather-moss)
Brachythecium rutabulum (Rough-stalked Feather-moss)
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)
Briza media (Quaking-grass)
Bromus hordeaceus (common soft brome)
Bromus inermis (smooth brome)
Bromus sitchensis (Alaska brome)
Bromus sterilis (barren brome)
Broussonetia papyrifera (Paper mulberry)
Brugmansia suaveolens (Angel's Trumpet)
Brunfelsia pauciflora (Yesterday-Today-and-Tomorrow)
Brunnera macrophylla (perennial forget-me-not)
Bryonia cretica (White Bryony)
Bryum argenteum (Silvery Bryum)
Buddleja davidii (butterfly bush)
Buddleja globosa (globe butterfly bush)
Buphthalmum salicifolium (Willowleaf Ox-eye)
Bupleurum longifolium (Long-leaved Hare's Ear)
Butia capitata (Pindo Palm)
Butia odorata (Jelly Palm)
Butomus umbellatus (flowering rush)
Buxus sempervirens (English Boxwood)
Caesalpinia pulcherrima (peacock flower)
Cakile maritima (European Searocket)
Caladium bicolor (Caladium)
Calamagrostis arenaria (European marram grass)
Calamagrostis brachytricha (Korean Feather Reed Grass)
Calamagrostis canadensis (bluejoint)
Calamagrostis epigejos (Bushgrass)
Calamintha nepeta ssp. nepeta (calamint)
Calliandra haematocephala (Pink Powder Puff)
Callicarpa bodinieri (beautyberry)
Calliergonella cuspidata (Pointed Spear-moss)
Callitriche stagnalis (Pond water-starwort)
Callitropsis nootkatensis (Alaska Cedar)
Callitropsis nootkatensis 'Pendula' (weeping Alaska yellow cedar)
Calluna vulgaris (Scotch Heather)
Calocedrus decurrens (incense cedar)
Caltha palustris (marsh marigold)
Calyptocarpus vialis (straggler daisy)
Calystegia sepium (hedge bindweed)
Calystegia silvatica (large bindweed)
Calystegia soldanella (Sea Bindweed)
Camassia cusickii (Cusick's Camas)
Camassia quamash (common camas)
Camellia japonica (Hot Flash Camellia)
Camellia japonica (Japanese camellia)
Camellia sasanqua (sasanqua camellia)
Camellia sinensis (Tea Plant)
Campanula carpatica (bellflower)
Campanula lactiflora (Milky Bellflower)
Campanula latifolia (Giant Bellflower)
Campanula patula (Spreading Bellflower)
Campanula portenschlagiana (Dalmatian Bellflower)
Campanula poscharskyana (Serbian Bellflower)
Campanula rapunculoides (Creeping Bellflower)
Campanula rotundifolia (Harebell)
Campanula spp. (bellflowers)
Campanula trachelium (Nettle-leaved Bellflower)
Camphora officinarum (Camphor)
Campylopus introflexus (Heath Star-moss)
Cananga odorata (Ylang-Ylang)
Canna glauca (Water Canna)
Capsella bursa-pastoris (shepherd's purse)
Capsicum annuum 'California Wonder' (California Wonder Bell Pepper)
Capsicum annuum 'Jalapeño' (Jalapeño Pepper)
Capsicum annuum 'Shishito' (Shishito Pepper)
Capsicum annuum 'Sweet Banana' (Sweet Banana Pepper)
Capsicum chinense 'Habanero' (Habanero Pepper)
Cardamine amara (large bittercress)
Cardamine concatenata (cut-leaved toothwort)
Cardamine flexuosa (wavy bittercress)
Cardamine hirsuta (shotweed)
Cardamine maxima (Large Toothwort)
Cardamine pratensis (Cuckooflower)
Cardamine trifolia (toothwort)
Cardiocrinum giganteum (giant Himalayan lily)
Carduus crispus (Welted Thistle)
Carduus nutans (musk thistle)
Carduus pycnocephalus (Italian thistle)
Carduus tenuiflorus (slenderflower thistle)
Carex acutiformis (lesser pond sedge)
Carex albicans (White-Tinged Sedge)
Carex amphibola (Creek Sedge)
Carex appalachica (Appalachian Sedge)
Carex arenaria (sand sedge)
Carex bicknellii (Bicknell's 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 divulsa (Berkeley Sedge)
Carex eburnea (Ivory 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 leavenworthii (Leavenworth's Sedge)
Carex lurida (sallow sedge)
Carex lyngbyei (Lyngby's sedge)
Carex morrowii 'Variegata' (Japanese Sedge)
Carex muskingumensis (Palm Sedge)
Carex nigra (smooth black sedge)
Carex obnupta (slough sedge)
Carex otrubae (False Fox-sedge)
Carex pallescens (pale sedge)
Carex panicea (grass-like sedge)
Carex pendula (Hanging sedge)
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 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 texensis (Texas Sedge)
Carex umbrosa (shade sedge)
Carex vulpina (fox sedge)
Carex vulpinoidea (Fox Sedge)
Carex woodii (Wood's Sedge)
Carlina vulgaris (Carline Thistle)
Carnegiea gigantea (saguaro)
Carpinus betulus (European Hornbeam)
Carpinus betulus 'Fastigiata' (narrow European hornbeam)
Carpinus caroliniana (American Hornbeam)
Carpinus cordata (Heartleaf Hornbeam)
Carpinus japonica (Japanese Hornbeam)
Carpobrotus edulis (sea fig)
Carya cordiformis (bitternut hickory)
Carya illinoinensis (pecan)
Carya ovata (shagbark hickory)
Castanea sativa (Sweet Chestnut)
Castanopsis cuspidata (Japanese Chinquapin)
Castilleja indivisa (Texas Paintbrush)
Catalpa speciosa (Northern Catalpa)
Catalpa spp. (catalpa)
Catapodium rigidum (Fern-grass)
Catharanthus roseus (Vinca / Periwinkle)
Caulophyllum thalictroides (Blue Cohosh)
Ceanothus gloriosus (Point Reyes ceanothus)
Ceanothus 'Victoria' (Victoria ceanothus)
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)
Ceiba speciosa (Pink Silk Floss Tree)
Celastrus orbiculatus (Asian bittersweet)
Celosia argentea (Cockscomb)
Celtis laevigata (sugar hackberry)
Celtis occidentalis (common hackberry)
Cenchrus setaceus (Fountain Grass)
Centaurea cyanus (Cornflower)
Centaurea debeauxii (Chalk Knapweed)
Centaurea diffusa (diffuse knapweed)
Centaurea jacea (Brown Knapweed)
Centaurea montana (Perennial Cornflower)
Centaurea nigra (black knapweed)
Centaurea nigrescens (meadow knapweed)
Centaurea scabiosa (Greater Knapweed)
Centaurea stoebe (spotted knapweed)
Centaurium erythraea (Common centaury)
Centranthus ruber (Red Valerian)
Cephalanthera damasonium (white helleborine)
Cephalanthus occidentalis (Buttonbush)
Cephalaria gigantea (Giant Scabious)
Cephalocereus senilis (Old Man Cactus)
Cephalotaxus fortunei (Chinese Plum Yew)
Cephalotaxus harringtonia (Japanese Plum Yew)
Cephalotaxus harringtonia (Japanese Plum Yew)
Cerastium arvense (field chickweed)
Cerastium glomeratum (Sticky mouse-ear chickweed)
Ceratocapnos claviculata (Climbing Corydalis)
Ceratodon purpureus (Redshank)
Ceratostigma plumbaginoides (Leadwort)
Ceratostigma willmottianum (Chinese Plumbago)
Cercidiphyllum japonicum (katsura)
Cercidiphyllum japonicum 'Pendulum' (weeping katsura)
Cercis canadensis (redbud)
Cercis canadensis 'Forest Pansy' (Forest Pansy redbud)
Cercis occidentalis (Western Redbud)
Cercis racemosa (Chain-flowered Redbud)
Cercis siliquastrum (Judas-tree)
Ceropegia woodii (String of Hearts)
Chaenomeles speciosa (flowering quince)
Chaerophyllum temulum (Rough chervil)
Chamaecrista fasciculata (partridge pea)
Chamaecyparis lawsoniana (Lawson Cypress)
Chamaecyparis obtusa (Hinoki Cypress)
Chamaecyparis obtusa 'Gracilis' (Slender Hinoki Cypress)
Chamaecyparis pisifera (Sawara Cypress)
Chamaecyparis pisifera 'Filifera' (Thread Cypress)
Chamaecyparis pisifera 'Filifera Aurea Nana' (Dwarf Golden Thread Cypress)
Chamaedorea cataractarum (Cat Palm)
Chamaedorea elegans (Parlor Palm)
Chamaedorea seifrizii (Bamboo Palm)
Chamaerops humilis (European Fan Palm)
Chasmanthium latifolium (Northern Sea Oats)
Chasmanthium laxum (Slender Woodoats)
Chelidonium majus (Greater celandine)
Chelone glabra (White Turtlehead)
Chelone obliqua (Rose Turtlehead)
Chelonopsis yagiharana (Yagihara Chelonopsis)
Chenopodium album (lambsquarters)
Chimaphila maculata (striped wintergreen)
Chimaphila umbellata (pipsissewa)
Chimonanthus praecox (Wintersweet)
Chionanthus retusus (Chinese Fringetree)
Chionanthus virginicus (White Fringetree)
Chlorophytum comosum (Spider Plant)
Choisya 'Aztec Pearl' (Mexican Orange Blossom)
Choisya ternata (Mexican Orange Blossom)
Choisya ternata 'Sundance' (Golden Mexican Orange Blossom)
Chondrus crispus (Irish Moss)
Chrozophora tinctoria (dyer's croton)
Chrysolepis chrysophylla (Golden Chinquapin)
Chrysosplenium oppositifolium (Opposite-leaved Golden-saxifrage)
Cicerbita macrophylla (Common Blue-sow-thistle)
Cichorium intybus (chicory)
Cimicifuga racemosa (black bugbane)
Cinnamomum verum (True Cinnamon)
Circaea canadensis (broadleaf enchanter's nightshade)
Circaea lutetiana (enchanter's-nightshade)
Cirsium acaulon (Stemless Thistle)
Cirsium arvense (Canada thistle)
Cirsium heterophyllum (Melancholy Thistle)
Cirsium horridulum (bristle thistle)
Cirsium palustre (Marsh Thistle)
Cirsium vulgare (bull thistle)
Cistus albidus (white-leaved cistus)
Cistus ladanifer (Gum Rockrose)
Cistus laurifolius (laurel-leaved cistus)
Cistus x hybridus (White Rockrose)
Cistus x purpureus (Orchid Rockrose)
Citrus australasica (Finger Lime)
Cladrastis kentukea (American Yellowwood)
Claytonia sibirica (Siberian miner's-lettuce)
Claytonia virginica (Virginia Springbeauty)
Clematis armandii (Armand Clematis)
Clematis cirrhosa (early clematis)
Clematis patens (spreading clematis)
Clematis spp. (clematis)
Clematis terniflora (Sweet Autumn Clematis)
Clematis virginiana (virgin's-bower)
Clematis vitalba (travelers-joy)
Clerodendrum trichotomum (harlequin glorybower)
Clethra alnifolia (summersweet, sweet pepperbush)
Clinopodium vulgare (Wild Basil)
Clintonia borealis (bluebead lily)
Clintonia uniflora (bead lily)
Clusia rosea (Autograph Tree)
Coccoloba uvifera (Sea Grape)
Cochlearia danica (Danish Scurvy-grass)
Cochlearia officinalis (Scurvy grass)
Cocos nucifera (Coconut Palm)
Coffea arabica (Coffee Plant)
Colchicum autumnale (Autumn Crocus)
Coleus scutellarioides (Coleus)
Comarum palustre (marsh cinquefoil)
Combretum rotundifolium (Monkey's Brush Plant)
Commelina communis (Asiatic dayflower)
Commelina dianthifolia (Birdbill Dayflower)
Commelina erecta (whitemouth dayflower)
Comptonia peregrina (Sweet Fern)
Conium maculatum (poison hemlock)
Conocephalum conicum (Great Scented Liverwort)
Conoclinium coelestinum (Blue Mistflower)
Conopholis americana (American cancer-root)
Conopodium majus (Pignut)
Convallaria majalis (lily of the valley)
Convolvulus arvensis (field bindweed, morning glory)
Corallina officinalis (Common Coralline)
Cordyline fruticosa (Ti Plant)
Coreopsis lanceolata (Lance-Leaved Coreopsis)
Coreopsis palmata (Stiff Tickseed)
Coreopsis rosea (Pink Tickseed)
Coreopsis tinctoria (plains coreopsis)
Coreopsis tripteris (Tall Coreopsis)
Coreopsis verticillata 'Moonbeam' (Moonbeam coreopsis, tickseed)
Coriandrum sativum (Cilantro)
Cornus alba 'Elegantissima' (variegated Tartarian dogwood)
Cornus alternifolia (Pagoda Dogwood)
Cornus canadensis (bunchberry)
Cornus drummondii (roughleaf dogwood)
Cornus florida (eastern dogwood)
Cornus florida 'Rubra' (pink dogwood)
Cornus kousa (kousa dogwood)
Cornus macrophylla (Large-leaved Dogwood)
Cornus mas (Cornelian cherry)
Cornus nuttallii (western dogwood, Pacific dogwood)
Cornus sericea (red twig dogwood, red osier)
Cornus sericea 'Flaviramea' (yellow twig dogwood)
Cornus sericea 'Kelseyi' (dwarf red twig dogwood)
Cornus unalaschkensis (bunchberry)
Corokia cotoneaster (Wire-netting Bush)
Cortaderia selloana (Pampas Grass)
Cortaderia selloana 'Pumila' (Dwarf Pampas Grass)
Corydalis (fumewort)
Corydalis scouleri (Scouler's fumewort)
Corydalis solida (Bird-in-a-bush)
Corylopsis glabrescens (Fragrant Winter Hazel)
Corylopsis sinensis (Chinese Winter Hazel)
Corylopsis spicata (Spike Winter Hazel)
Corylus avellana 'Contorta' (Harry Lauder's walking stick)
Corylus colurna (Turkish Hazelnut)
Corylus cornuta (hazel)
Corylus maxima 'Purpurea' (purple‑leaf filbert)
Cosmos atrosanguineus (chocolate cosmos)
Cotinus coggygria (smoke tree, smoke bush)
Cotinus coggygria Purpureus Group (purple-leaf smoke tree/bush)
Cotinus obovatus (American Smoke Tree)
Cotoneaster bullatus (hollyberry cotoneaster)
Cotoneaster buxifolius (Boxwood Cotoneaster)
Cotoneaster coriaceus (Parney cotoneaster)
Cotoneaster dammeri (Bearberry Cotoneaster)
Cotoneaster franchetii (Franchet 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)
Cotula coronopifolia (brass buttons)
Crambe maritima (Sea Kale)
Crassula helmsii (New Zealand pygmyweed)
Crassula ovata (Jade Plant)
Crataegus douglasii (Black Hawthorn)
Crataegus germanica (Medlar)
Crataegus laevigata (English Hawthorn)
Crataegus laevigata 'Paul's Scarlet' (Paul's Scarlet hawthorn)
Crataegus monogyna (common hawthorn)
Crataegus x lavallei (Lavalle hawthorn)
Crepis biennis (Rough Hawk's-beard)
Crepis vesicaria (Beaked Hawksbeard)
Crithmum maritimum (rock samphire)
Crocosmia spp. (crocosmia)
Crocosmia x crocosmiiflora 'Lucifer' (red crocosmia)
Crocus neapolitanus (spring crocus)
Crocus tommasinianus (Tommasini's Crocus)
Cruciata laevipes (Crosswort)
Cryphaea heteromalla (Lateral Cryphaea)
Cryptogramma crispa (parsley fern)
Cryptomeria japonica (Japanese Cedar)
Cryptomeria japonica 'Cristata' (Japanese Crested Cedar)
Cryptomeria japonica 'Sekkan Sugi' (Sekkan-Sugi cryptomeria)
Ctenidium molluscum (Comb-moss)
Cucumis sativus 'Marketmore 76' (Marketmore 76 Cucumber)
Cucumis sativus 'Straight Eight' (Straight Eight Cucumber)
Cucumis sativus 'Suyo Long' (Suyo Long Cucumber)
Cucurbita maxima 'Hubbard' (Hubbard Winter Squash)
Cucurbita moschata 'Butternut' (Butternut Squash)
Cucurbita pepo 'Black Beauty' (Black Beauty Zucchini)
Cucurbita pepo 'Delicata' (Delicata Squash)
Cucurbita pepo 'Yellow Crookneck' (Yellow Crookneck Squash)
Cunninghamia lanceolata (China Fir)
Cupressus sempervirens (Italian Cypress)
Cupressus sempervirens 'Stricta' (Italian Cypress)
Cuscuta epithymum (Clover Dodder)
Cycas circinalis (queen sago)
Cycas revoluta (Sago Palm)
Cyclamen coum (Spring cyclamen)
Cyclamen hederifolium (ivy-leaved cyclamen)
Cyclamen persicum (Florist's Cyclamen)
Cydonia oblonga (Quince)
Cylindropuntia kleiniae (Klein's Cholla)
Cylindropuntia leptocaulis (Christmas cholla)
Cylindropuntia whipplei (Whipple's Cholla)
Cymbalaria muralis (Ivy-leaved toadflax)
Cynanchica pyrenaica (Squinancywort)
Cynoglossum officinale (hound's-tongue)
Cynosurus cristatus (crested dogtail grass)
Cyperus eragrostis (tall flatsedge)
Cyperus rotundus (Purple Nutsedge)
Cypripedium acaule (pink lady's slipper)
Cypripedium spp. (lady's slipper)
Cyrtomium caryotideum (Fish-tail Holly Fern)
Cyrtomium falcatum (Japanese Holly Fern)
Cyrtomium fortunei (Fortune's Holly Fern)
Cyrtomium macrophyllum (Large-leaved Holly Fern)
Cyrtostachys renda (Sealing Wax Palm)
Cytisus scoparius (Scotch broom)
Daboecia cantabrica (Irish Heath)
Daboecia cantabrica f. alba (White Irish Heath)
Dactylis glomerata (orchard grass)
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)
Dahlia Hybrids (dahlia)
Dahlia merckii (Bedding Dahlia)
Dahlia pinnata (Garden Dahlia)
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 tangutica (Tangut Daphne)
Daphne x transatlantica 'Summer Ice' (Summer Ice hybrid daphne)
Daphniphyllum macropodum (Himalayan Daphniphyllum)
Darmera peltata (umbrella plant)
Dasiphora fruticosa (potentilla, cinquefoil)
Datura metel (Devil's Trumpet Plant)
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)
Davidia involucrata (dove tree)
Delonix regia (Royal Poinciana)
Delosperma sutherlandii (Sutherland's Ice Plant)
Delphinium Hybrids (delphinium)
Delphinium spp. (delphinium)
Dennstaedtia punctilobula (Hay-Scented Fern)
Deschampsia cespitosa (tufted hairgrass)
Descurainia spp. (tansy mustard)
Deutzia gracilis (slender deutzia)
Dianthus arenarius (sand pink)
Dianthus armeria (Deptford pink)
Dianthus barbatus (sweet William)
Dianthus carthusianorum (Carthusian Pink)
Dicentra cucullaria (Dutchman's breeches)
Dicentra formosa (Pacific bleeding heart)
Dichelostemma congestum (Ookow)
Dicranella heteromalla (Silky Forklet-moss)
Dicranoweisia cirrata (Common Pincushion)
Dicranum scoparium (Broom Forkmoss)
Dieffenbachia seguine (Dumb Cane)
Dierama pulcherrimum (Angel's Fishing Rod)
Diervilla rivularis (Bush Honeysuckle)
Digitalis ferruginea (Rusty Foxglove)
Digitalis grandiflora (Large Yellow Foxglove)
Digitalis laevigata (Grecian Foxglove)
Digitalis lutea (yellow foxglove)
Digitalis obscura (Sunset Foxglove)
Digitalis parviflora (Small-flowered Foxglove)
Digitalis purpurea (common foxglove)
Digitalis thapsi (Spanish Foxglove)
Dioscorea communis (Black Bryony)
Diospyros kaki (Japanese Persimmon)
Diospyros lotus (Date Plum)
Diospyros virginiana (American Persimmon)
Diphasiastrum digitatum (fan clubmoss)
Diphylleia cymosa (Umbrella Leaf)
Diplacus aurantiacus (orange bush monkeyflower)
Diplarrena moraea (Australian white iris)
Diplophyllum albicans (White Earwort)
Diplotaxis muralis (annual wall-rocket)
Diplotaxis tenuifolia (Perennial Wall-rocket)
Dipsacus fullonum (common teasel)
Dipterostemon capitatus (blue dicks)
Disanthus cercidifolius (Disanthus)
Disporum uniflorum (Yellow Fairybells)
Dodonaea viscosa (Akeake)
Doronicum pardalianches (Leopard's-bane)
Draba aizoides (Yellow Whitlow Grass)
Draba verna (Common Whitlowgrass)
Dracaena masoniana (Whale Fin Snake Plant)
Dracaena zeylanica (Ceylon Bowstring Hemp)
Dracocephalum grandiflorum (Large-flowered Dragonhead)
Drosera anglica (Great Sundew)
Drosera intermedia (spoonleaf sundew)
Drosera rotundifolia (round-leaved sundew)
Dryopteris affinis (Golden-scaled Male-fern)
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 wallichiana (Wallich's Wood Fern)
Duranta erecta (Golden Dewdrop)
Dypsis lutescens (Areca Palm)
Echeveria elegans (Mexican Gem)
Echinacea Hybrids (coneflower)
Echinacea pallida (Pale Purple Coneflower)
Echinacea paradoxa (Yellow Coneflower)
Echinacea purpurea (Purple Coneflower)
Echinacea simulata (Wavy-Leaved Purple Coneflower)
Echinochloa crus-galli (barnyardgrass)
Echinocystis lobata (prickly cucumber)
Echinops bannaticus (Blue Globe Thistle)
Echinops exaltatus (Russian Globe Thistle)
Echinops sphaerocephalus (Great Globe Thistle)
Echium pininana (Giant Viper's-bugloss)
Echium plantagineum (purple viper's-bugloss)
Echium vulgare (blueweed)
Edgeworthia chrysantha (edgeworthia, paperbush)
Edraianthus graminifolius (Grassy Bells)
Elaeagnus pungens (silverberry)
Elaeagnus pungens 'Maculata' (Golden Variegated Elaeagnus)
Elaeagnus umbellata (autumn olive)
Elliottia pyroliflora (copperbush)
Elymus athericus (sea couch)
Elymus glaucus (blue wildrye)
Elymus hystrix (Bottlebrush Grass)
Embothrium coccineum (Chilean fire tree)
Empetrum nigrum (black crowberry)
Encelia californica (California brittlebush)
Encelia farinosa (Brittlebush)
Enkianthus campanulatus (enkianthus)
Enkianthus perulatus (White Enkianthus)
Enkianthus serrulatus (white bell enkianthus)
Ensete ventricosum (Ethiopian Banana)
Epidendrum ibaguense (Reed Orchid)
Epigaea repens (trailing arbutus)
Epilobium brunnescens (New Zealand Willowherb)
Epilobium ciliatum (common willowherb (native))
Epilobium hirsutum (Great Willowherb)
Epilobium montanum (Broad-leaved Willowherb)
Epilobium parviflorum (Hoary Willowherb)
Epilobium tetragonum (Square-stemmed Willowherb)
Epimedium acuminatum (Pointed-leaved Barrenwort)
Epimedium davidii (David's Barrenwort)
Epimedium ssp. (barrenwort)
Epipactis helleborine (Broad-leaved helleborine)
Epipactis palustris (Marsh Helleborine)
Epipremnum aureum (Golden Pothos)
Epipremnum pinnatum (Dragon Tail Plant)
Equisetum arvense (common horsetail (native))
Equisetum fluviatile (water horsetail)
Equisetum hyemale (scouring rush)
Equisetum palustre (marsh horsetail)
Equisetum sylvaticum (wood horsetail)
Equisetum telmateia (great horsetail)
Eragrostis spectabilis (Purple Lovegrass)
Eranthis hyemalis (Winter Aconite)
Erechtites hieraciifolius (American burnweed)
Eremochloa ophiuroides (Centipede Grass)
Ericameria nauseosa (Rubber Rabbitbrush)
Erica spp. (heath)
Erica tetralix (Cross-leaved Heath)
Erigeron acris (bitter fleabane)
Erigeron annuus (annual fleabane)
Erigeron bonariensis (Flax-leaved Horseweed)
Erigeron canadensis (horseweed)
Erigeron floribundus (Tall Fleabane)
Erigeron karvinskianus (Mexican Fleabane)
Erigeron karvinskianus spp. (Mexican fleabane)
Erigeron strigosus (daisy fleabane)
Erigeron sumatrensis (tropical horseweed)
Erinus alpinus (Fairy Foxglove)
Eriobotrya japonica (Loquat)
Eriocapitella hupehensis (Hubei Anemone)
Eriogonum fasciculatum (California Buckwheat)
Eriophorum angustifolium (Common Cottongrass)
Eriophorum vaginatum (tussock cottongrass)
Eriophyllum confertiflorum (Golden Yarrow)
Erodium chrysanthum (Yellow Stork's Bill)
Erodium cicutarium (Redstem Stork's-bill)
Erodium moschatum (musk stork's-bill)
Eruca sativa (Arugula)
Eryngium agavifolium (Agave-leaved Sea Holly)
Eryngium alpinum (Alpine Sea Holly)
Eryngium amethystinum (Amethyst Sea Holly)
Eryngium Hybrids (sea holly)
Eryngium maritimum (Sea Holly)
Erysimum (wallflower)
Erysimum capitatum (Western Wallflower)
Erythranthe guttata (yellow monkey-flower)
Erythronium americanum (Yellow Trout Lily)
Erythronium oregonum (Oregon fawn lily)
Erythronium 'Pagoda' (Pagoda fawn lily)
Erythronium revolutum (coast fawn lily)
Escallonia rubra (redclaws)
Escallonia spp. (escallonia)
Eschscholzia californica (California poppy)
Eucalyptus coccifera (Tasmanian Snow Gum)
Eucalyptus neglecta (Omeo Gum)
Eucalyptus spp. (eucalyptus)
Eucryphia glutinosa (Brush Bush)
Euonymus alatus (Burning Bush)
Euonymus alatus 'Compactus' (dwarf winged euonymus)
Euonymus americanus (strawberry bush)
Euonymus europaeus (Spindle)
Euonymus fortunei (wintercreeper)
Euonymus japonicus (Japanese Euonymus)
Eupatorium cannabinum (hemp agrimony)
Eupatorium capillifolium (dogfennel)
Eupatorium perfoliatum (Boneset)
Eupatorium serotinum (late boneset)
Euphorbia amygdaloides (wood spurge)
Euphorbia characias wulfenii (Mediterranean spurge)
Euphorbia cornigera (Horned Spurge)
Euphorbia cyparissias (cypress 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 mellifera (Honey Spurge)
Euphorbia milii (Crown-of-Thorns)
Euphorbia myrsinites (Myrtle Spurge)
Euphorbia oblongata (eggleaf spurge)
Euphorbia paralias (Sea Spurge)
Euphorbia peplus (petty spurge)
Euphorbia pulcherrima (Poinsettia)
Euphorbia serpens (creeping spurge)
Euphorbia virgata (leafy spurge)
Euphrasia nemorosa (Common Eyebright)
Eurhynchium striatum (Common Striated Feather-moss)
Eurybia divaricata (white wood aster)
Eurybia divaricata (White Wood Aster)
Eurybia macrophylla (large-leaved aster)
Euthamia graminifolia (flat-topped goldenrod)
Eutrochium fistulosum (tall Joe-pye weed)
Fabiana imbricata (Pichi)
Fagopyrum esculentum (Common Buckwheat)
Fagus grandifolia (American Beech)
Fagus sylvatica (European beech)
Fagus sylvatica 'Pendula' (weeping beech)
Fagus sylvatica var. atropurpurea (purple beech)
Fagus sylvatica var. atropurpurea 'Pendula' (weeping copper beech)
Fallopia baldschuanica (Bukhara Fleeceflower)
Fallopia convolvulus (Black-bindweed)
Fargesia robusta (Robust Bamboo)
× Fatshedera lizei (fatshedera)
Fatsia japonica (fatsia)
Ferocactus cylindraceus (California Barrel Cactus)
Ferocactus wislizeni (fishhook barrel cactus)
Ferula communis (giant fennel)
Festuca glauca (blue fescue)
Festuca idahoensis (Idaho fescue)
Festuca rubra (Red Fescue)
Ficaria verna (lesser celandine)
Ficus altissima (Council Tree)
Ficus benghalensis (Ficus Audrey)
Ficus carica (common fig)
Ficus lyrata (fiddle leaf fig)
Ficus microcarpa (Ficus Ginseng)
Filago germanica (Common Cudweed)
Filipendula ulmaria (Meadowsweet)
Filipendula vulgaris (Dropwort)
Fissidens taxifolius (Common Pocket-moss)
Foeniculum vulgare (Fennel)
Forsythia x intermedia (hybrid forsythia)
Fothergilla gardenii (dwarf fothergilla)
Fouquieria splendens (ocotillo)
Fragaria 'Lipstick' (lipstick strawberry)
Francoa sonchifolia (Chilean bridalwreath)
Frangula alnus (alder buckthorn)
Frangula californica (coffeeberry)
Frangula purshiana (cascara)
Franklinia alatamaha (franklinia)
Fraxinus americana (White Ash)
Fraxinus latifolia (Oregon ash)
Fraxinus ornus (flowering ash, manna ash)
Fraxinus oxycarpa 'Raywood' (Raywood ash, Flame ash)
Fraxinus velutina (Velvet Ash)
Fritillaria imperialis (crown imperial)
Fritillaria meleagris (snakes-head fritillary)
Frullania dilatata (Dilated Scalewort)
Fuchsia magellanica (hardy fuchsia)
Fumaria capreolata (white ramping-fumitory)
Fumaria muralis (common ramping-fumitory)
Fumaria officinalis (Common Fumitory)
Funaria hygrometrica (Bonfire moss)
Gaillardia aristata (blanketflower)
Gaillardia pulchella (firewheel)
Galanthus elwesii (Giant Snowdrop)
Galanthus ikariae (Ikarian Snowdrop)
Galanthus nivalis (Common Snowdrop)
Galega officinalis (common milkpea)
Galeopsis bifida (Bifid Hemp-nettle)
Galeopsis tetrahit (Common hemp-nettle)
Galinsoga quadriradiata (shaggy soldier)
Galium album (white bedstraw)
Galium aparine (cleavers (native))
Galium boreale (Northern Bedstraw)
Galium mollugo (Hedge Bedstraw)
Galium odoratum (sweet woodruff)
Galium palustre (Common Marsh-bedstraw)
Galium saxatile (Heath Bedstraw)
Galium trifidum (small bedstraw (native))
Galium triflorum (fragrant bedstraw)
Galium verum (Lady's Bedstraw)
Gardenia jasminoides (Gardenia)
Garrya elliptica (coast silktassel)
Gaultheria mucronata (Chilean pernettya)
Gaultheria procumbens (wintergreen)
Gaultheria shallon (salal)
Gaura (Wand Flower)
Gelsemium sempervirens (Carolina Jessamine)
Genista lydia (Lydia broom)
Genista pilosa (silkyleaf woadwaxen)
Genista tinctoria (Dyer's Greenweed)
Gentiana asclepiadea (Willow Gentian)
Gentianella amarella (autumn gentian)
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 lucidum (shiny geranium)
Geranium macrorrhizum (Bigroot Geranium)
Geranium maculatum (wild geranium)
Geranium molle (dovefoot geranium)
Geranium pratense (Meadow Crane's-bill)
Geranium pusillum (Small-flowered Crane's-bill)
Geranium pyrenaicum (Hedgerow Crane's-bill)
Geranium robertianum (herb-Robert, stinky Bob)
Geranium rotundifolium (Roundleaf geranium)
Geranium sanguineum (Bloody Crane's-bill)
Geranium sylvaticum (wood crane's-bill)
Geranium tuberosum (Tuberous Geranium)
Geranium wallichianum (Purple-vein geranium)
Geranium wlassovianum (Wlassov's Geranium)
Geum canadense (white avens)
Geum macrophyllum (large-leaved avens)
Geum rivale (Water Avens)
Geum ssp. 'Cocktail Collection' (avens)
Geum urbanum (Wood Avens)
Ginkgo biloba (ginkgo, maidenhair tree)
Ginkgo biloba 'PNI 2720' (ginkgo)
Gladiolus communis (Gladiolus)
Gladiolus Hybrids (hardy gladiolus)
Gladiolus murielae (fragrant gladiolus)
Glandora diffusa (lithodora)
Glandularia bipinnatifida (Dakota mock vervain)
Glaucium flavum (Yellow Horned Poppy)
Glebionis coronaria (Garland Daisy)
Glebionis segetum (Corn Marigold)
Glechoma hederacea (ground-ivy)
Gleditsia triacanthos (honey locust)
Glyceria borealis (northern mannagrass)
Glyceria elata (tall mannagrass)
Glyceria fluitans (water manna grass)
Glyceria maxima (reed meadowgrass)
Gnaphalium uliginosum (marsh cudweed)
Goeppertia insignis (Rattlesnake Plant)
Goeppertia makoyana (Peacock Plant)
Goeppertia orbifolia (Round-Leaved Calathea)
Goeppertia ornata (Pinstripe Calathea)
Gomphrena globosa (Globe Amaranth)
Goodyera pubescens (downy rattlesnake plantain)
Grevillea victoriae (Royal Grevillea)
Grimmia pulvinata (Grey-cushioned Grimmia)
Gunnera manicata (gunnera)
Guzmania lingulata (Scarlet Star)
Gymnadenia conopsea (Fragrant Orchid)
Gymnocalycium mihanovichii (Moon Cactus)
Gymnocarpium disjunctum (oak fern)
Gymnocladus dioicus (Kentucky coffee tree)
Hacquetia epipactis (hacqetia)
Hakonechloa macra (Hakone grass)
Halesia carolina (Carolina silverbell)
Hamamelis mollis (Chinese witch hazel)
Hamamelis x intermedia (hybrid witch hazel)
Handroanthus chrysotrichus (Golden Trumpet Tree)
Handroanthus impetiginosus (Pink Trumpet Tree)
Hedera helix (English Ivy)
Hedera hibernica (Atlantic or Irish ivy)
Helenium autumnale (Sneezeweed)
Helenium spp. (sneezeweed)
Helianthus angustifolius (Swamp Sunflower)
Helianthus annuus (Common Sunflower)
Helianthus tuberosus (Jerusalem artichoke)
Heliconia rostrata (Hanging Lobster Claw)
Helictotrichon sempervirens (blue oat grass)
Heliotropium curassavicum (alkali heliotrope)
Helleborus argutifolius (Corsican hellebore)
Helleborus atrorubens (dark red hellebore)
Helleborus foetidus (Stinking hellebore)
Helleborus orientalis (Lenten Rose)
Helleborus x hybridus (hybrid hellebore)
Helminthotheca echioides (bristly oxtongue)
Helosciadium nodiflorum (Fool's Watercress)
Hemerocallis Hybrids (daylily)
Hepatica acutiloba (sharp-lobed hepatica)
Hepatica americana (round-lobed hepatica)
Heptapleurum arboricola (Miniature umbrella tree)
Heracleum mantegazzianum (giant hogweed)
Heracleum maximum (cow-parsnip)
Heracleum sphondylium (hogweed)
Hesperaloe parviflora (Red Yucca)
Hesperis matronalis (dame's rocket)
Hesperocyparis arizonica (Arizona Cypress)
×Hesperocyparis leylandii (Leyland cypress)
Hesperocyparis macrocarpa 'Goldcrest' (Goldcrest Monterey Cypress)
Hesperoyucca whipplei (chaparral yucca)
Heteromeles arbutifolia (Toyon)
Heterotheca subaxillaris (Camphorweed)
Heuchera americana (American Alumroot)
Heuchera micrantha (small-flowered alumroot)
Heuchera micrantha (native heuchera)
Heuchera spp. (coral bells)
Hibiscus coccineus (Scarlet Rose Mallow)
Hibiscus moscheutos (Hardy Hibiscus)
Hibiscus rosa-sinensis (Tropical Hibiscus)
Hibiscus syriacus (Rose of Sharon)
Hieracium umbellatum (Canada hawkweed)
Hippocrepis comosa (horseshoe vetch)
Hippophae rhamnoides (Sea-buckthorn)
Hirschfeldia incana (Shortpod Mustard)
Holcus lanatus (common velvet-grass)
Holodiscus discolor (ocean spray)
Homalothecium sericeum (Silky Wall Feather-moss)
Honckenya peploides (Sea Sandwort)
Hordeum jubatum (foxtail barley)
Hordeum murinum (wall barley)
Hordeum vulgare (Common Barley)
Hosta Hybrids (hosta)
Houstonia caerulea (azure bluet)
Hoya kerrii (Sweetheart Hoya)
Hoya pubicalyx (Wax Plant)
Huperzia selago (northern firmoss)
Hyacinthoides hispanica (Spanish bluebells)
Hyacinthoides non-scripta (bluebell)
Hyacinthus orientalis (hyacinth)
Hydrangea anomala ssp. petiolaris (climbing hydrangea)
Hydrangea integrifolia (evergreen climbing hydrangea)
Hydrangea macrophylla (bigleaf hydrangea)
Hydrangea petiolaris (climbing hydrangea)
Hydrangea quercifolia (oak-leaf hydrangea)
Hydrilla verticillata (hydrilla)
Hydrocotyle ranunculoides (floating marsh pennywort)
Hydrocotyle vulgaris (Marsh Pennywort)
Hydrophyllum tenuipes (Pacific waterleaf)
Hydrophyllum virginianum (Virginia waterleaf)
Hylocomiadelphus triquetrus (rough goose neck moss)
Hylocomium splendens (stairstep moss)
Hyophorbe lagenicaulis (Bottle Palm)
Hypericum androsaemum (Tutsan)
Hypericum calycinum (St. John's wort)
Hypericum elodes (Marsh St John's-wort)
Hypericum hirsutum (Hairy St John's-wort)
Hypericum Hybrids (hybrid hypericum)
Hypericum kalmianum (Kalm St. John's Wort)
Hypericum perforatum (common St. Johnswort)
Hypericum pulchrum (Slender St John's-wort)
Hypericum tetrapterum (Square Stemmed Saint John's Wort)
Hypnum andoi (mamillate plait-moss)
Hypnum cupressiforme (Cypress-leaved Plait-moss)
Hypnum jutlandicum (Heath Plait-moss)
Hypochaeris radicata (hairy cat's-ear)
Hypoestes phyllostachya (Polka Dot Plant)
Iberis saxatilis (rock candytuft)
Iberis sempervirens (candytuft)
Iberis spathulata (Pyrenean Candytuft)
Ilex aquifolium (English holly)
Ilex aquifolium 'Ferox Argentea' (variegated porcupine holly)
Ilex crenata (Japanese holly)
Ilex verticillata (common winterberry)
Ilex x meserveae (blue-leaved hybrid holly)
Impatiens capensis (spotted jewelweed)
Impatiens glandulifera (policeman's helmet)
Impatiens omeiana (Golden Impatiens)
Impatiens pallida (pale jewelweed)
Impatiens parviflora (small balsam)
Inga edulis (Ice Cream Bean)
Ipomoea cairica (Mile-a-minute vine)
Ipomoea cordatotriloba (Tievine)
Ipomoea indica (oceanblue morning glory)
Ipomoea pes-caprae (Beach Morning Glory)
Ipomoea purpurea (common morning-glory)
Iris florentina (Florentine iris)
Iris paradoxa (paradoxical iris)
Iris pseudacorus (Yellow Iris)
Iris versicolor (northern blue flag)
Iris virginica (Virginia Iris)
Ixora coccinea (Jungle flame)
Jacaranda mimosifolia (Jacaranda)
Jacobaea aquatica (Marsh Ragwort)
Jacobaea erucifolia (Hoary Ragwort)
Jacobaea vulgaris (tansy ragwort)
Jasione montana (Sheep's Bit Scabious)
Jasminum nudiflorum (winter jasmine)
Jasminum polyanthum (Pink Jasmine)
Jeffersonia diphylla (twinleaf)
Juglans californica (California Black Walnut)
Juglans nigra (black walnut)
Juglans regia (English walnut)
Juncus acutiflorus (Sharp-flowered Rush)
Juncus articulatus (jointed rush)
Juncus bufonius (Toad rush)
Juncus conglomeratus (Compact Rush)
Juncus effusus (soft rush)
Juncus ensifolius (dagger-leaf rush)
Juncus squarrosus (heath rush)
Juncus tenuis (Path Rush)
Juniperus californica (California Juniper)
Juniperus chinensis 'Kaizuka' (Hollywood Juniper)
Juniperus communis (common juniper)
Juniperus conferta (shore juniper)
Juniperus horizontalis (creeping juniper)
Juniperus sabina 'Tamariscifolia' (Tam Juniper)
Juniperus scopulorum (Rocky Mountain Juniper)
Justicia fulvicoma (Orange Shrimp Plant)
Kalanchoe blossfeldiana (Flaming Katy)
Kalmia angustifolia (sheep laurel)
Kalmia latifolia (mountain laurel)
Kerria japonica (Japanese kerria)
Kerria japonica 'Pleniflora' (double kerria)
Kindbergia praelonga (Common Feather-moss)
Kirengeshoma palmata (yellow waxbells)
Knautia arvensis (Field Scabious)
Knautia macedonica (Macedonian Scabious)
Kniphofia Hybrids (torch lily, red hot poker)
Koelreuteria paniculata (goldenrain tree)
Laburnum anagyroides (golden chain tree)
Lactuca serriola (prickly lettuce)
Lactuca virosa (bitter lettuce)
Lagerstroemia spp. (crape myrtle)
Lagurus ovatus (Hare's Tail Grass)
Lamium album (White deadnettle)
Lamium amplexicaule (henbit deadnettle)
Lamium galeobdolon (yellow archangel)
Lamium hybridum (cutleaf deadnettle)
Lamium maculatum (deadnettle)
Lamium purpureum (red deadnettle)
Lamprocapnos spectabilis (bleeding heart)
Laportea canadensis (wood nettle)
Lapsana communis (nipplewort)
Larix decidua (European Larch)
Larix kaempferi (Japanese Larch)
Larix laricina (tamarack)
Larix spp. (larch)
Larrea tridentata (Creosote Bush)
Lathraea clandestina (Purple Toothwort)
Lathraea squamaria (Common Toothwort)
Lathyrus latifolius (broad-leaved sweet pea)
Lathyrus linifolius (Bitter Vetch)
Lathyrus nissolia (Grass Vetchling)
Lathyrus pratensis (meadow pea)
Laurus nobilis (bay laurel)
Lavandula angustifolia (English lavender)
Lavandula stoechas (Spanish lavender)
Lemna minor (Common Duckweed)
Leontodon hispidus (Rough Hawkbit)
Leontodon saxatilis (Hairy Hawkbit)
Leonurus cardiaca (common motherwort)
Lepidium didymum (Lesser swine-cress)
Lepidium draba (Heart-podded Hoary Cress)
Lepidium latifolium (perennial pepperweed)
Lepidium virginicum (Virginia pepperweed)
Lespedeza cuneata (Chinese bushclover)
Leucaena leucocephala (White leadtree)
Leucanthemum maximum (max chrysanthemum)
Leucanthemum vulgare (Oxeye Daisy)
Leucanthemum x superbum (Shasta daisy)
Leucobryum glaucum (Pincushion Moss)
Leucojum aestivum (spring snowflakes)
Leucothoë axillaris (drooping leucothoe)
Leucothoë fontanesiana 'Girard's Rainbow' (Rainbow leucothoe)
Lewinskya affinis (Wood Bristle-moss)
Lewisia cotyledon (lewisia)
Leycesteria formosa (Himalayan honeysuckle)
Liatris ligulistylis (Meadow Blazing Star)
Liatris spicata (prairie star)
Licuala grandis (Ruffled Fan Palm)
Ligularia dentata (ligularia)
Ligustrum japonicum 'Texanum' (waxleaf privot)
Ligustrum lucidum (tree privet)
Ligustrum ovalifolium (garden privet)
Ligustrum vulgare (common privet)
Lilium (Asiatic Hybrids) (Asiatic lilies)
Lilium candidum (Madonna lily)
Lilium (Orienpet Hybrids) (orienpet lilies)
Lilium (Oriental Hybrids) (oriental lilies)
Limbarda crithmoides (Golden Samphire)
Limonium vulgare (Common Sea-lavender)
Linaria purpurea (toadflax)
Linaria vulgaris (common toadflax)
Lindera benzoin (northern spicebush)
Linnaea borealis (twinflower)
Linum bienne (Pale flax)
Linum catharticum (Fairy Flax)
Linum usitatissimum (common flax)
Liquidambar styraciflua (sweetgum)
Liriodendron tulipifera (tulip tree)
Liriope muscari (lily turf)
Liriope spicata (Creeping Lilyturf)
Lithospermum officinale (Common Gromwell)
Livistona chinensis (Chinese Fan Palm)
Lobelia cardinalis (cardinal flower)
Lobelia erinus (bedding lobelia)
Lobelia inflata (Indian tobacco)
Lobelia siphilitica (Great Blue Lobelia)
Lobularia maritima (sweet alyssum)
Lolium arundinaceum (tall fescue)
Lolium perenne (Perennial Ryegrass)
Lonicera ciliosa (trumpet honeysuckle)
Lonicera involucrata (twinberry honeysuckle)
Lonicera involucrata (twinberry 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 pileata (box-leaved honeysuckle)
Lonicera sempervirens (Coral Honeysuckle)
Lonicera tatarica (Tatarian honeysuckle)
Lonicera xylosteum (Fly Honeysuckle)
Lophiolepis eriophora (Woolly Thistle)
Lophocolea bidentata (Bifid Crestwort)
Lotus corniculatus (bird's-foot trefoil)
Lotus pedunculatus (big bird's-foot trefoil)
Lunaria annua (moneyplant)
Lunularia cruciata (Crescent-cup liverwort)
Lupinus arboreus (coastal bush lupine)
Lupinus bicolor (Miniature Lupine)
Lupinus latifolius (wild lupine)
Lupinus polyphyllus (garden lupine)
Lupinus texensis (Texas bluebonnet)
Luzula campestris (Field woodrush)
Luzula parviflora (small-flowered wood rush)
Luzula sylvatica (Great Woodrush)
Lychnis coronaria (rose campion)
Lycium barbarum (Goji Berry)
Lycopodium clavatum (stag's-horn clubmoss)
Lycopus europaeus (European water-horehound)
Lygodium japonicum (Japanese climbing fern)
Lysichiton americanus (swamp lanterns, skunk cabbage)
Lysimachia arvensis (scarlet pimpernel)
Lysimachia borealis (northern starflower)
Lysimachia europaea (Arctic Starflower)
Lysimachia maritima (Sea Milkwort)
Lysimachia nemorum (Yellow Pimpernel)
Lysimachia nummularia (creeping Jenny)
Lysimachia punctata (Dotted Loosestrife)
Lysimachia tenella (Bog Pimpernel)
Lysimachia vulgaris (Yellow Loosestrife)
Lythrum salicaria (purple loosestrife)
Macaranga tanarius (Elephant's Ear)
Maclura pomifera (Osage-orange)
Magnolia grandiflora (southern magnolia)
Magnolia sieboldii (Oyama magnolia)
Magnolia × soulangeana (saucer magnolia)
Magnolia stellata (star magnolia)
Magnolia virginiana (Sweetbay Magnolia)
Mahonia aquifolium (Oregon grape)
Mahonia nervosa (dwarf Oregon grape)
Mahonia repens (creeping mahonia)
Maianthemum bifolium (May Lily)
Maianthemum canadense (Canada mayflower)
Maianthemum dilatatum (false lily of the valley)
Maianthemum racemosum (false Solomon's Seal)
Maianthemum stellatum (star-flowered false Solomon's seal)
Malosma laurina (laurel sumac)
Malpighia emarginata (Acerola Cherry)
Malus (crabapple)
Malus domestica (apple)
Malus fusca (crabapple)
Malus sylvestris (European Wild Apple)
Malva arborea (Tree Mallow)
Malva moschata (musk mallow)
Malva neglecta (dwarf mallow, cheese plant)
Malva sylvestris (Common Mallow)
Malvaviscus arboreus (Turk's cap)
Mandevilla sanderi (Pink Mandevilla)
Marah macrocarpa (Chilicothe)
Marah oregana (bigroot, manroot)
Marchantia polymorpha (Common Liverwort)
Marrubium vulgare (White Horehound)
Matricaria chamomilla (German Chamomile)
Matricaria discoidea (pineapple weed)
Matteuccia struthiopteris (Ostrich Fern)
Medeola virginiana (Cucumber Root)
Medicago arabica (Spotted medick)
Medicago lupulina (black medic)
Medicago polymorpha (bur clover)
Medicago sativa (Alfalfa)
Melampyrum pratense (Common Cow-wheat)
Melia azedarach (Chinaberry)
Melica uniflora (Wood Melick)
Melilotus albus (White Sweetclover)
Melilotus altissimus (tall melilot)
Melilotus indicus (small melilot)
Melilotus officinalis (Yellow Sweetclover)
Melissa officinalis (Lemon Balm)
Mentha aquatica (watermint)
Mentha spicata (Spearmint)
Mentha suaveolens (Apple Mint)
Menyanthes trifoliata (Bogbean)
Mercurialis annua (Annual mercury)
Mercurialis perennis (Dog's Mercury)
Metasequoia glyptostroboides (dawn redwood)
Metzgeria furcata (Forked Veilwort)
Metzgeria violacea (Bluish Veilwort)
Micranthes stellaris (Hairy Kidney-wort)
Microbiota decussata (Russian Cypress)
Microsorum diversifolium (Kangaroo Paw Fern)
Microstegium vimineum (Japanese stiltgrass)
Milium effusum (Wood Millet)
Mimosa pudica (Sensitive Plant)
Mirabilis jalapa (Marvel of Peru)
Miscanthus sinensis (Miscanthus)
Mitchella repens (partridgeberry)
Mnium hornum (Horn Calcareous Moss)
Moehringia trinervia (Three-nerved Sandwort)
Monarda bradburiana (Eastern Bee Balm)
Monarda citriodora (lemon beebalm)
Monarda didyma (Bee Balm)
Monarda fistulosa (Wild Bergamot)
Monarda punctata (spotted horsemint)
Monotropa hypopitys (pinesap)
Monotropa uniflora (Ghost Pipe)
Monstera adansonii (Swiss Cheese Vine)
Monstera deliciosa (Swiss Cheese Plant)
Monstera siltepecana (Silver Monstera)
Montia fontana (blinks)
Morella californica (California wax myrtle)
Morella cerifera (Wax Myrtle)
Moringa oleifera (Moringa)
Muhlenbergia capillaris (Pink Muhly Grass)
Muhlenbergia dumosa (Bamboo Muhly)
Muhlenbergia lindheimeri (Lindheimer's Muhly)
Muhlenbergia reverchonii (Seep Muhly)
Musa acuminata (Dwarf Banana Plant)
Musa basjoo (Hardy Banana)
Musa textilis (abacá, Manila hemp)
Muscari armeniacum (grape hyacinth)
Muscari neglectum (Musk Hyacinth)
Mutarda arvensis (charlock)
Mutarda nigra (Black Mustard)
Mycelis muralis (wall lettuce)
Mycelis muralis (wall lettuce)
Myosotis arvensis (field forget-me-not)
Myosotis discolor (Changing Forget-me-not)
Myosotis ramosissima (Early Forget-me-not)
Myosotis scorpioides (water forget-me-not)
Myosotis sylvatica (forget-me-not)
Myriophyllum aquaticum (parrotfeather)
Myriophyllum spicatum (Eurasian watermilfoil)
Myrrhis odorata (sweet cicely)
Narcissus (daffodil)
Narcissus pseudonarcissus (wild daffodil)
Narthecium ossifragum (bog asphodel)
Nassella tenuissima (Mexican feather/hair grass)
Nasturtium officinale (Watercress)
Nekemias arborea (peppervine)
Neltuma glandulosa (honey mesquite)
Nematanthus spp. (goldfish plant)
Neottia ovata (Common Twayblade)
Nephroia carolina (Carolina snailseed)
Nephrolepis cordifolia (Fishbone Fern)
Nephrolepis exaltata (Boston Fern)
Nephrolepis obliterata (Kimberley Queen Fern)
Nicandra physalodes (apple-of-Peru)
Nicotiana glauca (tree tobacco)
Nothoscordum bivalve (crowpoison)
Nuphar lutea (yellow water-lily)
Nymphaea alba (European White Waterlily)
Nymphaea odorata (American white waterlily)
Nymphoides peltata (water fringe)
Nyssa sylvatica (sour gum, tupelo)
Odontites vernus (Red Bartsia)
Odontites vulgaris (Red Odontites)
Oemleria cerasiformis (osoberry)
Oenanthe crocata (Hemlock Water-dropwort)
Oenanthe pimpinelloides (Corky-fruited Water-dropwort)
Oenanthe sarmentosa (water-parsley)
Oenothera biennis (evening primrose)
Oenothera fruticosa (evening primrose)
Oenothera glazioviana (Large-flowered Evening-primrose)
Oenothera laciniata (cutleaf evening primrose)
Oenothera lindheimeri (wandflower)
Olea europaea (Olive Tree)
Oncidium sphacelatum (Spider Orchid Bush)
Onobrychis viciifolia (Sainfoin)
Onoclea sensibilis (sensitive fern)
Ononis spinosa (Spiny restharrow)
Onopordum acanthium (Scotch thistle)
Ophioglossum vulgatum (southern adder's-tongue)
Ophiopogon japonicus (Mondo Grass)
Ophiopogon planiscapus 'Nigrescens' (Black mondo grass)
Ophrys apifera (Bee Orchid)
Ophrys insectifera (Fly Orchid)
Oplopanax horridus (devil's club)
Opuntia ficus-indica (Prickly Pear Cactus)
Opuntia microdasys (Bunny Ears Cactus)
Opuntia polyacantha (Plains Pricklypear)
Opuntia santa-rita (Santa Rita Prickly Pear)
Orchis mascula (Early Purple Orchid)
Orchis purpurea (Lady Orchid)
Origanum majorana (Sweet Marjoram)
Origanum vulgare (Oregano)
Ornithogalum umbellatum (common star-of-Bethlehem)
Ornithopus perpusillus (Bird's-foot)
Orobanche hederae (ivy broomrape)
Orobanche minor (Common Broomrape)
Orthilia secunda (one-sided wintergreen)
Orthotrichum anomalum (Anomalous Bristle-moss)
Orthotrichum diaphanum (White-tipped Bristle-moss)
Orthotrichum pulchellum (Elegant Bristle-moss)
Osmanthus delavayi (Delavay osmanthus)
Osmanthus fragrans (Sweet Osmanthus)
Osmanthus heterophyllus (holly-leaved osmanthus)
Osmanthus heterophyllus 'Goshiki' (Goshiki holly-leaf osmanthus)
Osmanthus heterophyllus 'Variegatus' (Variegated holly osmanthus)
Osmanthus x burkwoodii (Burkwood osmanthus)
Osmunda claytoniana (interrupted fern)
Osmunda regalis (Royal Fern)
Osmunda spectabilis (American Royal Fern)
Osmundastrum cinnamomeum (Cinnamon Fern)
Osmundea pinnatifida (Pepper Dulse)
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 oregana (redwood sorrel)
Oxalis pes-caprae (Bermuda buttercup)
Oxalis stricta (upright yellow woodsorrel)
Oxalis violacea (violet woodsorrel)
Oxydendrum arboreum (sourwood)
Oxyrrhynchium hians (Swartz's Feather-moss)
Pachira aquatica (Money Tree)
Pachyphragma macrophyllum (giant spring brassica)
Pachysandra terminalis (Japanese spurge)
Packera aurea (golden ragwort)
Packera glabella (Butterweed)
Paeonia lactiflora (garden peony)
Paeonia officinalis (common peony)
Paeonia ssp. (tree peony)
Palmaria palmata (Dulse)
Panicum amarum (Bitter Panicgrass)
Panicum virgatum (Switchgrass)
Papaver atlanticum (Atlas Poppy)
Papaver cambricum (welsh poppy)
Papaver dubium (Long-headed poppy)
Papaver orientale (Oriental poppy)
Papaver rhoeas (common poppy)
Papaver somniferum (opium poppy)
Parahebe perfoliata (Koromiko)
Parietaria judaica (pellitory-of-the-wall)
Paris polyphylla (multi-leaf paris)
Paris quadrifolia (herb paris)
Parkinsonia aculeata (Mexican palo verde)
Parnassia palustris (marsh grass-of-Parnassus)
Parrotia persica (Persian parrotia, ironwood)
Parthenium hysterophorus (Santa Maria feverfew)
Parthenocissus inserta (thicket creeper)
Parthenocissus tricuspidata (Boston ivy)
Paspalum notatum (Bahia Grass)
Passiflora edulis (passion fruit)
Passiflora incarnata (purple passionflower)
Paulownia tomentosa (empress tree)
Pedicularis canadensis (Canadian lousewort)
Pedicularis palustris (Marsh Lousewort)
Pedicularis sylvatica (Common Lousewort)
Pellaea rotundifolia (Button Fern)
Pellia epiphylla (common pellia)
Pennisetum alopecuroides (Fountain Grass)
Penstemon digitalis (foxglove beardtongue)
Penstemon Hybrids (Beard Tongue)
Penstemon pallidus (Pale Beardtongue)
Penstemon smallii (Smalls Beardtongue)
Pentaglottis sempervirens (Green Alkanet)
Pentanema squarrosum (Ploughman's-spikenard)
Peperomia argyreia (Watermelon Peperomia)
Peperomia obtusifolia (Baby Rubber Plant)
Perilla frutescens (beefsteak plant)
Persicaria amphibia (water smartweed)
Persicaria amplexicaulis 'Firetail' (Red knotweed)
Persicaria hydropiper (waterpepper)
Persicaria lapathifolia (dock-leaved smartweed)
Persicaria longiseta (low smartweed)
Petasites frigidus (coltsfoot)
Petasites hybridus (Common Butterbur)
Petasites japonicus (fuki,butterburr)
Petasites pyrenaicus (Winter Heliotrope)
Petrosedum rupestre (Reflexed Stonecrop)
Phacelia distans (distant phacelia)
Phacelia tanacetifolia (Lacy phacelia)
Phalaris arundinacea (reed canary grass)
Phaseolus vulgaris 'Blue Lake' (Blue Lake Green Bean)
Phaseolus vulgaris 'Kentucky Wonder' (Kentucky Wonder Bean)
Phaseolus vulgaris 'Provider' (Provider Bush Bean)
Phedimus kamtschaticus (Orange Stonecrop)
Phedimus selskianus (Selsky Stonecrop)
Phegopteris decursive-pinnata (Japanese Beech Fern)
Philadelphus spp. (mock orange)
Philodendron gloriosum (Glorious Philodendron)
Philodendron hastatum (Silver Sword Philodendron)
Philodendron hederaceum (Heartleaf Philodendron)
Phlebodium aureum (Blue Star Fern)
Phleum pratense (Timothy grass)
Phlomis russeliana (Jerusalem sage)
Phlox divaricata (Woodland Phlox)
Phlox paniculata (Garden Phlox)
Phoenix canariensis (Canary Island palm)
Phoenix roebelenii (Pygmy Date Palm)
Phoenix sylvestris (Silver Date Palm)
Photinia davidiana (tall stranvaesia)
Photinia x fraseri (Red tip photinia)
Phragmites australis (common reed)
Phygelius x rectus Hybrids (cape fuchsia)
Phyla nodiflora (turkey tangle frogfruit)
Phyllostachys aurea (golden bamboo)
Phyllostachys nigra (black bamboo)
Physocarpus capitatus (Pacific ninebark)
Physocarpus opulifolius 'Monlo' (Diabolo® ninebark)
Physostegia virginiana (Obedient Plant)
Phyteuma scheuchzeri (Oxford Rampion)
Phytolacca americana (American pokeweed)
Picea abies (Norway Spruce)
Picea abies 'Nidiformis' (bird's nest spruce)
Picea abies 'Pendula' (Weeping Norway Spruce)
Picea abies 'Reflexa' (weeping Norway spruce)
Picea glauca (white spruce)
Picea glauca 'Conica' (Dwarf Alberta Spruce)
Picea omorika (Serbian Spruce)
Picea orientalis (Oriental spruce)
Picea pungens 'Glauca' (Colorado Blue Spruce)
Picea sitchensis (Sitka Spruce)
Picris hieracioides (Hawkweed Oxtongue)
Pieris japonica 'Variegata' (Variegated Japanese Pieris)
Pilea microphylla (Artillery Plant)
Pilosella aurantiaca (orange hawkweed)
Pilosella officinarum (mouse-eared hawkweed)
Pimpinella saxifraga (Burnet-saxifrage)
Pinguicula vulgaris (Common Butterwort)
Pinus cembra (Swiss stone pine)
Pinus contorta var. contorta (Shore Pine)
Pinus contorta var. latifolia (Lodgepole Pine)
Pinus densiflora (Japanese Red Pine)
Pinus monticola (Western White Pine)
Pinus mugo (mugo pine)
Pinus nigra (Austrian Pine)
Pinus parviflora (Japanese White Pine)
Pinus ponderosa (Ponderosa Pine)
Pinus strobus (eastern white pine)
Pinus sylvestris (Scots Pine)
Pinus taeda (Loblolly Pine)
Pinus thunbergii (Japanese Black Pine)
Pinus thunbergii 'Thunderhead' (Thunderhead Japanese black pine)
Piper nigrum (Black Pepper Plant)
Pistacia lentiscus (mastic)
Pittosporum tenuifolium (pittosporum tenuifolium)
Pittosporum tobira (Japanese pittosporum)
Plagiomnium undulatum (Palm-tree Moss)
Plagiothecium undulatum (Waved Silk-moss)
Plantago coronopus (Buck's-horn Plantain)
Plantago lanceolata (English plantain)
Plantago major (common plantain)
Plantago maritima (Sea Plantain)
Plantago media (Hoary Plantain)
Platanthera chlorantha (Greater butterfly-orchid)
Platanus × acerifolia (London plane tree)
Platanus occidentalis (American Sycamore)
Platanus orientalis (Oriental Plane)
Platanus racemosa (California Sycamore)
Platycerium bifurcatum (Staghorn Fern)
Pleioblastus pygmaeus (dwarf bamboo)
Plenogemma phyllantha (Frizzled Pincushion)
Pleopeltis michauxiana (resurrection fern)
Pleurozium schreberi (Red-stemmed Feather Moss)
Plumeria rubra (Plumeria)
Poa annua (annual bluegrass)
Poa pratensis (Kentucky Bluegrass)
Poa trivialis (Rough Meadow-grass)
Podophyllum peltatum (mayapple)
Podophyllum pleianthum (Chinese mayapple)
Podophyllum 'Spotty Dotty' (Spotty Dotty mayapple)
Podosphaera xanthii (Cucurbit Powdery Mildew)
Polygala serpyllifolia (Heath Milkwort)
Polygala vulgaris (Common Milkwort)
Polygonatum (Solomon's seal)
Polygonatum biflorum (Solomons Seal)
Polygonatum multiflorum (Solomon's-seal)
Polygonum aviculare (common knotweed)
Polypodium glycyrrhiza (licorice fern)
Polypodium interjectum (intermediate polypody)
Polypodium virginianum (rock polypody)
Polypodium vulgare (common polypody)
Polypogon viridis (water beard grass)
Polystichum acrostichoides (Christmas Fern)
Polystichum aculeatum (hard shield fern)
Polystichum munitum (Western sword fern)
Polystichum polyblepharum (Korean tassel fern)
Polystichum setiferum (soft shield fern)
Polytrichum commune (Common Haircap Moss)
Polytrichum formosum (Bank Haircap Moss)
Polytrichum juniperinum (juniper haircap moss)
Polytrichum piliferum (bristly haircap moss)
Pontederia cordata (pickerelweed)
Pontederia crassipes (common water hyacinth)
Populus alba (white poplar)
Populus balsamifera ssp. trichocarpa (black cottonwood)
Populus deltoides (Eastern Cottonwood)
Populus fremontii (Frémont Cottonwood)
Populus nigra 'Italica' (Lombardy poplar)
Populus tremula (European aspen)
Populus tremuloides (quaking aspen)
Populus trichocarpa (cottonwood)
Portulaca oleracea (purslane)
Potamogeton natans (floating-leaved pondweed)
Potamogeton polygonifolius (Bog Pondweed)
Potentilla argentea (Silvery Cinquefoil)
Potentilla erecta (Tormentil)
Potentilla indica (mock strawberry)
Potentilla recta (sulfur cinquefoil)
Potentilla reptans (Creeping cinquefoil)
Potentilla sterilis (Barren Strawberry)
Primula (polyanthus)
Primula kisoana (Kisan primrose)
Primula sieboldii (sakura)
Primula veris (Cowslip)
Prosartes smithii (Largeflower Fairybells)
Prostanthera cuneata (alpine mint bush)
Prunella vulgaris (self heal)
Prunus cerasifera (purple leaf plum, cherry plum)
Prunus insititia (Damson)
Prunus 'Kanzan' (Kwanzan flowering cherry)
Prunus laurocerasus 'Mt. Vernon' (Mt. Vernon laurel)
Prunus laurocerasus 'Zabeliana' (Zabel laurel)
Prunus lusitanica (Portuguese laurel)
Prunus padus (bird cherry)
Prunus serotina (Black Cherry)
Prunus 'Shirotae' (Mt. Fuji flowering cherry)
Prunus spinosa (Blackthorn)
Prunus virginiana (Chokecherry)
Pseudisothecium myosuroides (Mouse-tail Moss)
Pseudofumaria lutea (Yellow Fumitory)
Pseudognaphalium luteoalbum (Jersey Cudweed)
Pseudogynoxys chenopodioides (Mexican Flame Vine)
Pseudosasa japonica (Arrow Bamboo)
Pseudoscleropodium purum (Neat Feather-moss)
Pseudotrillium rivale (brook wakerobin)
Pseudotsuga menziesii (Douglas fir)
Psidium guajava (White Guava)
Pteridium aquilinum (bracken fern)
Pterocarya fraxinifolia (Caucasian Wingnut)
Ptychostomum capillare (Capillary Thread-moss)
Pulicaria dysenterica (Common Fleabane)
Pulmonaria (lungwort)
Pulmonaria obscura (Suffolk Lungwort)
Pulmonaria officinalis (Lungwort)
Pulsatilla nuttalliana (prairie pasqueflower)
Pulsatilla occidentalis (Western pasqueflower)
Pulsatilla patens (Eastern Pasque Flower)
Pulsatilla vulgaris (common pasqueflower)
Pycnanthemum muticum (Short-Toothed Mountain Mint)
Pycnanthemum virginianum (Virginia Mountain Mint)
Pyracantha spp. (firethorn pyracantha)
Pyrus calleryana (Callery flowering pear)
Quercus agrifolia (Coast Live Oak)
Quercus alba (White Oak)
Quercus bicolor (Swamp White Oak)
Quercus cerris (Turkey Oak)
Quercus coccinea (scarlet oak)
Quercus frainetto (Hungarian oak)
Quercus garryana (Oregon white oak, Garry oak)
Quercus ilex (holly oak)
Quercus lobata (Valley Oak)
Quercus macrocarpa (Bur Oak)
Quercus montana (chestnut oak)
Quercus nigra (water oak)
Quercus palustris (pin oak)
Quercus petraea (sessile oak)
Quercus robur (English oak)
Quercus rotundifolia (sweet acorn oak)
Quercus rubra (red oak)
Quercus sadleriana (Sadler's Oak)
Quercus stellata (post oak)
Quercus suber (cork oak)
Quercus velutina (black oak)
Quercus virginiana (Southern Live Oak)
Rabelera holostea (greater stitchwort)
Racomitrium lanuginosum (Woolly Fringe-moss)
Radula complanata (Flat-leaved Scalewort)
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 flammula (Lesser Spearwort)
Ranunculus lingua (Greater Spearwort)
Ranunculus omiophyllus (Round-leaved Crowfoot)
Ranunculus repens (creeping buttercup)
Ranunculus sceleratus (cursed crowfoot)
Raphanus raphanistrum (Wild radish)
Ratibida columnifera (upright prairie coneflower)
Ravenea rivularis (Majesty Palm)
Reseda lutea (Wild Mignonette)
Reseda luteola (Weld)
Reynoutria japonica (Japanese knotweed)
Rhamnus cathartica (common buckthorn)
Rhaphiolepis umbellata 'Minor' (rhaphiolepis)
Rhapidophyllum hystrix (Needle Palm)
Rhapis excelsa (Lady Palm Tree)
Rheum palmatum 'Atrosanguineum' (ornamental rhubarb)
Rheum rhabarbarum (Rhubarb)
Rhinanthus minor (Yellow Rattle)
Rhizomnium punctatum (Dotted Thyme-moss)
Rhodiola rosea (Roseroot)
Rhododendron 'Hino-Crimson' (Hino-Crimson Azalea)
Rhododendron impeditum (Dwarf Purple Rhododendron)
Rhododendron indicum (southern Indian azalea)
Rhododendron japonicum (Japanese azalea)
Rhododendron lepidotum (scaly rhododendron)
Rhododendron luteum (Yellow Azalea)
Rhododendron maximum (great rhododendron)
Rhododendron menziesii (mock azalea)
Rhododendron mucronulatum (Korean azalea)
Rhododendron occidentale (western azalea)
Rhododendron ponticum (Common Rhododendron)
Rhododendron quinquefolium (quinquefolium azalea)
Rhododendron schlippenbachii (royal azalea)
Rhododendron stenopetalum 'Linearifolium' (spider azalea)
Rhododendron yakushimanum (yakushima rhododendron)
Rhus aromatica (fragrant sumac)
Rhus copallinum (shining sumac)
Rhus glabra (smooth sumac)
Rhus integrifolia (lemonade berry)
Rhus typhina (staghorn sumac)
Rhynchospora colorata (White-Top Sedge)
Rhynchostegium confertum (Clustered Feather-moss)
Rhytidiadelphus loreus (Lanky Moss)
Rhytidiadelphus squarrosus (Square Gooseneck Moss)
Ribes bracteosum (stink current)
Ribes lacustre (swamp gooseberry)
Ribes nigrum (Blackcurrant)
Ribes rubrum (Red Currant)
Ribes sanguineum (red flowering currant)
Ribes uva-crispa (European gooseberry)
Ricinus communis (castor bean)
Rivina humilis (pigeonberry)
Robinia pseudoacacia (black locust)
Robinia pseudoacacia 'Frisia' (golden black locust)
Rodgersia (rodgersia)
Romneya coulteri (Matilija poppy)
Rorippa palustris (Bog Yellowcress)
Rosa arvensis (Field Rose)
Rosa canina (dog rose)
Rosa (Floribunda Group) (floribunda roses)
Rosa glauca (redleaf rose)
Rosa gymnocarpa (bald-hip rose)
Rosa gymnocarpa (bald-hip rose)
Rosa multiflora (multiflora rose)
Rosa nutkana (Nootka rose)
Rosa pisocarpa (clustered wild rose)
Rosa rubiginosa (Sweet-brier)
Rosa rugosa (rugosa rose)
Rosa spinosissima (Burnet Rose)
Rubia peregrina (Wild Madder)
Rubus allegheniensis (Allegheny blackberry)
Rubus armeniacus (Himalayan blackberry)
Rubus caesius (European dewberry)
Rubus chamaemorus (cloudberry)
Rubus hayata-koidzumii (creeping raspberry)
Rubus idaeus (raspberry)
Rubus laciniatus (evergreen blackberry)
Rubus occidentalis (black raspberry)
Rubus odoratus (purple-flowered raspberry)
Rubus parviflorus (thimbleberry)
Rubus phoenicolasius (wineberry)
Rubus spectabilis (salmonberry)
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 hirta (large black-eyed Susan)
Rudbeckia laciniata (cutleaf coneflower)
Rudbeckia triloba (Brown-Eyed Susan)
Ruellia simplex (Mexican Petunia)
Rumex acetosa (Sorrel)
Rumex acetosella (sheep sorrel)
Rumex conglomeratus (Clustered Dock)
Rumex crispus (curly-leaved dock)
Rumex cristatus (Greek Dock)
Rumex hydrolapathum (Water Dock)
Rumex obtusifolius (broad-leaved dock)
Rumex sanguineus (Wood Dock)
Ruscus aculeatus (butcher's-broom)
Sabal minor (Dwarf Palmetto)
Sabal palmetto (cabbage palmetto)
Sagina procumbens (pearlwort)
Sagina subulata (Irish moss)