Cardamine hirsuta

Linnaeus

Sp. Pl. 2: 655. 1753.

WeedyIntroduced
Treatment appears in FNA Volume 7. Treatment on page 475. Mentioned on page 466.

Annuals; sparsely hirsute basally (at least on petiole of basal leaves), often glabrous distally. Rhizomes absent. Stems erect, ascending, or decumbent, unbranched or branched basally and/or distally, (0.3–)1–3.5(–4.5) dm, (not flexuous). Basal leaves (persistent to anthesis), rosulate, (5–)8–15(–22)-foliolate, (2–)3.5–15(–17) cm, leaflets petiolulate; petiole 0.5–5 cm, (ciliate); lateral leaflet blade oblong, ovate, obovate, or orbicular, smaller than terminal, margins entire, repand, crenate, or 3-lobed; terminal leaflet (petiolule 0.2–1 cm), blade reniform or orbicular, 0.4–2 cm × 6–30 mm, margins entire, repand, dentate, or 3 or 5-lobed. Cauline leaves 1–4(–6), compound as basal, petiolate, [(0.5–)1.2–5.5(–7) cm, including petiole], leaflets petiolulate; blade base not auriculate; leaflets similar to basal. Racemes ebracteate. Fruiting pedicels erect to ascending, (2–)3–10(–14) mm. Flowers: sepals oblong, 1.5–2.5 × 0.3–0.7 mm, lateral pair not saccate; petals (sometimes absent) white, spatulate, 2.5–4.5(–5) × 0.5–1.1 mm; (stamens usually 4, lateral pair often absent, rarely 5 or 6); filaments 1.8–3 mm; anthers ovate, 0.3–0.5 mm. Fruits linear, (torulose), (0.9–)1.5–2.5(–2.8) cm × (0.8–)1–1.4 mm, (often appressed to rachis); ovules 14–40 per ovary; style 0.1–0.6(–1) mm. Seeds light brown, oblong or subquadrate, 0.9–1.3(–1.5) × 0.6–0.9(–1.1) mm, (narrowly margined). 2n = 16.


Phenology: Flowering Feb–Jul.
Habitat: Roadsides, clearings, disturbed sites, slopes, cedar glades, mixed woods, meadows, fields, waste grounds, damp places, grassy areas
Elevation: 0-700 m

Distribution

V7 727-distribution-map.gif

Introduced; B.C., Ont., Ala., Ark., Calif., Conn., Del., D.C., Fla., Ga., Ill., Ky., La., Md., Mass., Mich., Miss., Mo., N.J., N.Y., N.C., Ohio, Okla., Oreg., Pa., S.C., Tenn., Tex., Utah, Va., Wash., W.Va., w Eurasia, introduced also in Central America, South America, e Asia (Japan), South Africa, Australia.

Discussion

Herbarium specimens of Cardamine hirsuta have been misidentified as C. oligosperma.

Selected References

None.

Lower Taxa

None.
... more about "Cardamine hirsuta"
Ihsan A. Al-Shehbaz +, Karol Marhold +  and Judita Lihová +
Linnaeus +
B.C. +, Ont. +, Ala. +, Ark. +, Calif. +, Conn. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ky. +, La. +, Md. +, Mass. +, Mich. +, Miss. +, Mo. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Oreg. +, Pa. +, S.C. +, Tenn. +, Tex. +, Utah +, Va. +, Wash. +, W.Va. +, w Eurasia +, introduced also in Central America +, South America +, e Asia (Japan) +, South Africa +  and Australia. +
0-700 m +
Roadsides, clearings, disturbed sites, slopes, cedar glades, mixed woods, meadows, fields, waste grounds, damp places, grassy areas +
Flowering Feb–Jul. +
Weedy +  and Introduced +
Dentaria +, Dracamine +  and Loxostemon +
Cardamine hirsuta +
Cardamine +
species +