Alliaria petiolata
Bull. Orto Bot. Regia Univ. Napoli 3: 418. 1913.
Stems simple or branched distally, (1.5–) 3–9 (–13) dm; glabrous or pilose basally, trichomes to 1.5 mm. Basal leaves: petiole 3–16 (–22) cm; blade reniform or cordate, (6–) 15–88 (–118) mm wide (shorter in length), surfaces glabrous or pilose. Cauline leaves: petiole shorter than basal; blade ovate, cordate, or deltate, to 15 × 15 cm, base cordate or truncate, margins acutely to obtusely toothed, apex acute. Racemes several-flowered. Fruiting pedicels terete, (2–) 3–10 (–15) mm. Flowers: sepals (2–) 2.5–3.5 (–4.5) × 0.7–1.5 mm; petals (2.5–) 4–8 (–9) × (1.5–) 2–3 (–3.5) mm, base attenuate to clawlike; filaments 2–3.5 (–4.5) mm; anthers oblong, 0.7–1 mm. Fruits divaricate-ascending, subtorulose, quadrangular or subterete, (2–) 3–7 (–8) cm × 1.2–2.5 mm; style (0.2–) 1–2 (–3) mm. Seeds dark-brown or black, narrowly oblong, 2–4.5 × 0.7–2 mm. 2n = 42.
Phenology: Flowering Apr–May.
Habitat: Roadsides, trails, railroad tracks, stream banks, waste places, fields, shaded woodlands, bluffs, thickets, steep slopes, disturbed fields, floodplains, woods, shaded forest floor
Elevation: 0-1200 m
Distribution
Introduced; B.C., Ont., Conn., Del., D.C., Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Mo., Nebr., N.H., N.J., N.Y., N.C., Ohio, Okla., Oreg., Pa., R.I., Tenn., Utah, Vt., Va., Wash., W.Va., Wis., South America (Argentina), Eurasia, n Africa
Discussion
Selected References
None.
Lower Taxa
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