Lepidium pinnatifidum |
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feather-leaf pepper-weed, wayside pepper grass |
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Habit | Annuals; puberulent. |
Stems | simple from base, erect, (paniculately) branched beyond base or distally, 2–6 dm. |
Basal leaves | (soon withered, often before anthesis); not rosulate; blade dentate to pinnatifid. |
Cauline leaves | shortly petiolate to subsessile; blade narrowly oblanceolate to linear, 1–3.3 cm × 1–4 mm, base attenuate, not auriculate, margins entire. |
Racemes | (often paniculate), considerably elongated in fruit; rachis glabrous or puberulent, trichomes straight, cylindrical. |
Flowers | sepals oblong, 0.7–0.8 × 0.3–0.4 mm; petals (rudimentary), white, linear, 0.4–0.6 × 0.05–0.1 mm, claw absent; stamens 4, median and lateral; filaments 0.6–0.8 mm; anthers ca. 0.2 mm. |
Fruiting pedicels | divaricate-ascending to horizontal, straight, (terete), 2–3.5 × 0.1–0.15 mm, puberulent adaxially. |
Fruits | orbicular to broadly elliptic, 1.8–2 × 1.7–1.8 mm, apically not winged, apical notch 0.05–0.1 mm deep; valves thin, smooth, not veined, sparsely pilose; style ca. 0.1 mm, equaling apical notch. |
Seeds | oblong, 1–1.2 × 0.7–0.8 mm. |
Lepidium pinnatifidum |
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Phenology | Flowering May–Jun. |
Habitat | Waste places, disturbed sites |
Elevation | 0-600 m (0-2000 ft) |
Distribution |
e Europe; w Asia [Introduced, Calif.]
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Discussion | Lepidium pinnatifidum apparently has not become a serious weed of the Californian flora. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 591. |
Parent taxa | Brassicaceae > tribe Lepidieae > Lepidium |
Sibling taxa | |
Name authority | Ledebour: Fl. Ross. 1: 206. (1841) |
Web links |