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Overview
Leucanthemum vulgare (syn. Chrysanthemum leucanthemum) is a rhizomatous herbaceous perennial in the daisy family (Asteraceae) reaching 12–36 inches (30–90 cm) tall with a 12–24 inch (30–60 cm) spread. Basal leaves are spatulate, 2–5 inches (5–13 cm) long, with crenate (rounded-toothed) margins on long petioles. Stem leaves are progressively smaller upward, oblong, sessile, clasping, with coarse irregular teeth. Stems are erect, usually unbranched, smooth to sparsely hairy. Flower heads are solitary at the stem tips, 1.5–2.5 inches (4–6 cm) in diameter, with 20–30 white ray florets surrounding a flat to slightly domed yellow disc. Each head produces 200–500 seeds lacking a pappus. Plants spread by shallow, creeping rhizomes and by seed. A single plant produces 1,300–4,000 seeds annually, and dense stands produce up to 26,000 seeds per square yard (31,000 per square meter). Listed as a noxious weed in multiple U.S. states and Canadian provinces. Dense colonies form in pastures, meadows, and roadsides, displacing native grasses and reducing forage quality. Rhizome fragments as small as 0.5 inch (1 cm) regenerate.
Native Range
Native to Europe and temperate Asia, occurring in meadows, grasslands, and roadsides from sea level to approximately 7,000 feet (2,100 m). Introduced to North America as an ornamental and in contaminated seed, now naturalized across most of the United States and Canada. Classified as a noxious weed in several western and midwestern states.Suggested Uses
Used in noxious weed identification training and rangeland management curricula. Studied in meadow ecology and invasion biology. In its native European range, the species is a component of traditional hay meadow communities. Flower heads are used in wildflower identification exercises for Asteraceae ray/disc morphology.How to Identify
Appearance
Size & Dimensions
Height1' - 3'
Width/Spread1' - 2'
Bloom Information
Flowers from May through August, with peak bloom in June and July in temperate climates. Individual flower heads remain open for 10–14 days. Flowering progresses from the primary terminal head to lateral branches over 4–6 weeks. In the Pacific Northwest, peak bloom occurs in June. Mowing delays but does not prevent flowering, as plants rebloom from lateral buds. Pollinated by bees, flies, and beetles.Detailed Descriptions
Flower Description
White rays with yellow discFoliage Description
Dark green; basal leaves spatulate with crenate margins on long petioles; stem leaves oblong, sessile, clasping, with irregular teethGrowing Conditions
Sun Requirements
Requires 6-10 hours of direct sunlight daily
• Full Sun: 6+ hours of direct sunlight
• Partial Shade: 3-6 hours of direct sunlight
• Full Shade: Less than 3 hours of direct sunlight
Care & Maintenance
Care Guide
Classified as a noxious weed in several U.S. states; management focuses on reducing rhizome spread and seed production. Hand-pulling is effective in small infestations if all rhizome fragments are removed; fragments left in soil regenerate within 2–3 weeks. Mowing before seed maturity reduces seed production but does not eliminate rhizome-based spread. Repeated mowing 3–4 times per season for 2–3 years weakens rhizomes in some populations. Dense stands in pastures reduce forage availability and are avoided by cattle due to the acrid taste of the foliage. Revegetation with competitive perennial grasses after removal limits re-establishment from the soil seed bank.Pruning
No pruning applicable in a horticultural sense. Cutting flowering stems to the basal rosette before seed set reduces dispersal. Plants resprout from rhizomes after cutting and may produce a second flowering flush. In managed meadow or pasture settings, mowing to 3–4 inches (8–10 cm) at early bloom stage prevents seed maturation.Pruning Schedule
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summer