Difference between revisions of "Lepidium sordidum"
Smithsonian Contr. Knowl. 3(5): 10. 1852.
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|tribe=Brassicaceae tribe Lepidieae | |tribe=Brassicaceae tribe Lepidieae | ||
|genus=Lepidium | |genus=Lepidium | ||
Revision as of 00:02, 28 May 2020
Annuals; puberulent, (trichomes clavate). Stems simple or several from base, erect to decumbent, branched (several) distally, 0.5–2.4(–3.2) dm. Basal leaves (soon withered); not rosulate; petiole 0.8–2.5 cm; blade 1- or 2-pinnatifid, 3–5.6 cm, margins (of lobes) entire or dentate. Cauline leaves petiolate; blade pinnatifid (similar to basal), 0.7–2 cm × 2–10 mm, base attenuate to cuneate, not auriculate, margins dentate to incised or pinnately lobed. Racemes (paniculate), elongated, (often dense) in fruit; rachis puberulent, trichomes straight or curved, clavate. Fruiting pedicels ascending to divaricate, straight or slightly recurved, (terete), (1.4–)1.6–2.3(–2.9) × 0.1–0.15 mm, puberulent adaxially. Flowers: sepals (tardily deciduous), oblong, 0.5–0.7 × 0.3–0.4 mm; petals (absent or rudimentary), white, linear, 0.2–0.4 × 0.05 mm, claw absent; stamens 2, median; filaments 0.5–0.8 mm; anthers 0.1–0.15 mm. Fruits ovate-elliptic, 1.7–2.1 × 1.2–1.6 mm, apically winged, apical notch 0.1–0.2 mm deep; valves thin, smooth, not or weakly veined, glabrous; style 0.1–0.15 mm, included in or equaling apical notch. Seeds oblong, 0.8–1 × 0.5–0.6 mm.
Phenology: Flowering May–Jul.
Habitat: Alluvial fans, sandy flats, rocky hillsides, grassy valleys, canyons
Elevation: 1500-1900 m
Distribution
Tex., Mexico (Chihuahua, Durango, Federal District, Hidalgo, Sinaloa, Zacatecas).
Discussion
Selected References
None.