Alliaria petiolata

(M. Bieberstein) Cavara & Grande
Bull. Orto Bot. Regia Univ. Napoli 3: 418. 1913.
WeedyIntroducedIllustrated
Basionym: Arabis petiolata M. Bieberstein Fl. Taur.-Cauc. 2: 126. 1808
Synonyms: Alliaria officinalis Andrzejowski ex M. Bieberstein Erysimum alliaria Linnaeus
Treatment appears in FNA Volume 7. Treatment on page 745.

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

V7 1311-distribution-map.gif

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

None.

... more about "Alliaria petiolata"
Ihsan A. Al-Shehbaz +
(M. Bieberstein) Cavara & Grande +
Arabis petiolata +
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 +  and n Africa. +
0-1200 m +
Roadsides, trails, railroad tracks, stream banks, waste places, fields, shaded woodlands, bluffs, thickets, steep slopes, disturbed fields, floodplains, woods, shaded forest floor +
Flowering Apr–May. +
Bull. Orto Bot. Regia Univ. Napoli +
Weedy +, Introduced +  and Illustrated +
Alliaria officinalis +  and Erysimum alliaria +
Alliaria petiolata +
Alliaria +
species +