Edit History
Lepidium ruderale Linnaeus [family CRUCIFERAE]
Date Updated: 23 July 2012
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 7,
Names
Lepidium ruderale Linnaeus [family CRUCIFERAE], Sp. Pl., 2: 645. 1753
Lepidium texanum Buckley [family CRUCIFERAE]
Lepidium virginicum Linnaeus subsp. texanum (Buckley) Thellung [family CRUCIFERAE]
Treatment Author(s)
Ihsan A. Al-Shehbaz
John F. Gaskin
Information
Annuals or biennials; (fetid); puberulent (trichomes cylind-rical). Stems simple from base, erect ascending, branched (several) distally, (0.5–)1–3.5(–5.5) dm. Basal leaves rosulate; petiole 1–3.2(–5.3) cm; blade (1- or) 2- or 3-pinnatisect (lobes oblong), (1.5–)3–5(–7.2) cm, margins (of lobes) usually entire, rarely dentate. Cauline leaves sessile; blade linear, (0.4–)1–2(–3) cm × 0.5–2.5(–3.5) mm, base cuneate, not auriculate, margins entire. Racemes considerably elongated in fruit; rachis puberulent, trichomes straight, cylindrical. Fruiting pedicels divaricate to horizontal, straight, (terete), (1.5–)2–4(–5) × 0.1–0.15 mm, puberulent. Flowers: sepals oblong, 0.5–0.9(–1) × 0.2–0.4 mm; petals (absent or rudimentary), white, linear, 0.2–0.5 × 0.1 mm, claw absent; stamens 2, median; filaments 0.7–0.8 mm; anthers 0.1–0.2 mm. Fruits elliptic, (1.5–)1.8–2.5(–3) × 1.5–2(–2.3) mm, apically winged, apical notch 0.1–0.2 mm deep; valves thin, smooth, not veined, glabrous; style obsolete or to 0.1 mm, included in apical notch. Seeds oblong to ovate-oblong, 1–1.5 × 0.6–0.8 mm. 2n = 16, 32.
Phenology
apr-may (spring), jun-jul (summer)
Altitude range
0–300 m;
Distribution
Eurasiaintroduced also in South AmericaAustralia.USA Ala.USA Ark.USA Calif.USA Del.USA Fla.USA Ind.USA La.USA MaineUSA Md.USA Mass.USA Mich.USA N.H.USA N.J.USA N.Mex.USA N.Y.USA N.C.USA OhioUSA Oreg.USA Pa.USA R.I.USA Tenn.USA Tex.Canada Alta.Canada B.C.Canada Man.Canada N.B.Canada Nfld. and Labr. (Nfld.)Canada N.S.Canada Ont.Canada P.E.I.Canada Que.Canada Sask.
Native/Introduced
introduced;
Date Updated: 23 July 2012
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 7,
Names
Lepidium ruderale Linnaeus [family CRUCIFERAE], Sp. Pl., 2: 645. 1753
Lepidium texanum Buckley [family CRUCIFERAE]
Lepidium virginicum Linnaeus subsp. texanum (Buckley) Thellung [family CRUCIFERAE]
Treatment Author(s)
Ihsan A. Al-Shehbaz
John F. Gaskin
Information
Annuals or biennials; (fetid); puberulent (trichomes cylind-rical). Stems simple from base, erect ascending, branched (several) distally, (0.5–)1–3.5(–5.5) dm. Basal leaves rosulate; petiole 1–3.2(–5.3) cm; blade (1- or) 2- or 3-pinnatisect (lobes oblong), (1.5–)3–5(–7.2) cm, margins (of lobes) usually entire, rarely dentate. Cauline leaves sessile; blade linear, (0.4–)1–2(–3) cm × 0.5–2.5(–3.5) mm, base cuneate, not auriculate, margins entire. Racemes considerably elongated in fruit; rachis puberulent, trichomes straight, cylindrical. Fruiting pedicels divaricate to horizontal, straight, (terete), (1.5–)2–4(–5) × 0.1–0.15 mm, puberulent. Flowers: sepals oblong, 0.5–0.9(–1) × 0.2–0.4 mm; petals (absent or rudimentary), white, linear, 0.2–0.5 × 0.1 mm, claw absent; stamens 2, median; filaments 0.7–0.8 mm; anthers 0.1–0.2 mm. Fruits elliptic, (1.5–)1.8–2.5(–3) × 1.5–2(–2.3) mm, apically winged, apical notch 0.1–0.2 mm deep; valves thin, smooth, not veined, glabrous; style obsolete or to 0.1 mm, included in apical notch. Seeds oblong to ovate-oblong, 1–1.5 × 0.6–0.8 mm. 2n = 16, 32.
Phenology
apr-may (spring), jun-jul (summer)
Altitude range
0–300 m;
Distribution
Eurasiaintroduced also in South AmericaAustralia.USA Ala.USA Ark.USA Calif.USA Del.USA Fla.USA Ind.USA La.USA MaineUSA Md.USA Mass.USA Mich.USA N.H.USA N.J.USA N.Mex.USA N.Y.USA N.C.USA OhioUSA Oreg.USA Pa.USA R.I.USA Tenn.USA Tex.Canada Alta.Canada B.C.Canada Man.Canada N.B.Canada Nfld. and Labr. (Nfld.)Canada N.S.Canada Ont.Canada P.E.I.Canada Que.Canada Sask.
Native/Introduced
introduced;
Date Updated: 23 July 2012
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 7,
Names
Lepidium ruderale Linnaeus [family CRUCIFERAE], Sp. Pl., 2: 645. 1753
Lepidium texanum Buckley [family CRUCIFERAE]
Lepidium virginicum Linnaeus subsp. texanum (Buckley) Thellung [family CRUCIFERAE]
Treatment Author(s)
Ihsan A. Al-Shehbaz
John F. Gaskin
Information
Annuals or biennials; (fetid); puberulent (trichomes cylind-rical). Stems simple from base, erect ascending, branched (several) distally, (0.5–)1–3.5(–5.5) dm. Basal leaves rosulate; petiole 1–3.2(–5.3) cm; blade (1- or) 2- or 3-pinnatisect (lobes oblong), (1.5–)3–5(–7.2) cm, margins (of lobes) usually entire, rarely dentate. Cauline leaves sessile; blade linear, (0.4–)1–2(–3) cm × 0.5–2.5(–3.5) mm, base cuneate, not auriculate, margins entire. Racemes considerably elongated in fruit; rachis puberulent, trichomes straight, cylindrical. Fruiting pedicels divaricate to horizontal, straight, (terete), (1.5–)2–4(–5) × 0.1–0.15 mm, puberulent. Flowers: sepals oblong, 0.5–0.9(–1) × 0.2–0.4 mm; petals (absent or rudimentary), white, linear, 0.2–0.5 × 0.1 mm, claw absent; stamens 2, median; filaments 0.7–0.8 mm; anthers 0.1–0.2 mm. Fruits elliptic, (1.5–)1.8–2.5(–3) × 1.5–2(–2.3) mm, apically winged, apical notch 0.1–0.2 mm deep; valves thin, smooth, not veined, glabrous; style obsolete or to 0.1 mm, included in apical notch. Seeds oblong to ovate-oblong, 1–1.5 × 0.6–0.8 mm. 2n = 16, 32.
Phenology
apr-may (spring), jun-jul (summer)
Altitude range
0–300 m;
Distribution
Eurasiaintroduced also in South AmericaAustralia.USA Ala.USA Ark.USA Calif.USA Del.USA Fla.USA Ind.USA La.USA MaineUSA Md.USA Mass.USA Mich.USA N.H.USA N.J.USA N.Mex.USA N.Y.USA N.C.USA OhioUSA Oreg.USA Pa.USA R.I.USA Tenn.USA Tex.Canada Alta.Canada B.C.Canada Man.Canada N.B.Canada Nfld. and Labr. (Nfld.)Canada N.S.Canada Ont.Canada P.E.I.Canada Que.Canada Sask.
Native/Introduced
introduced;
![Lepidium ruderale Linnaeus [family CRUCIFERAE]](/fsi/img/misc/plants/static_thumbs/flora_north_america_icon96.jpg)
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