Difference between revisions of "Lepidium austrinum"
Fl. S.E. U.S., 468, 1331. 1903.
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|place=468, 1331. 1903 | |place=468, 1331. 1903 | ||
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+ | |special_status={{Treatment/ID/Special_status | ||
+ | |code=W | ||
+ | |label=Weedy | ||
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|publication title=Fl. S.E. U.S., | |publication title=Fl. S.E. U.S., | ||
|publication year=1903 | |publication year=1903 | ||
− | |special status= | + | |special status=Weedy;Illustrated |
− | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V7/V7_926.xml |
|tribe=Brassicaceae tribe Lepidieae | |tribe=Brassicaceae tribe Lepidieae | ||
|genus=Lepidium | |genus=Lepidium |
Latest revision as of 23:37, 5 November 2020
Annuals or biennials; often densely hirsute, (trichomes cylindrical). Stems often simple from base, erect, branched distally, (1.5–)2–6.7(–9.4) dm. Basal leaves (later withered); rosulate; petiole (0.7–)1.5–4.5 cm; blade pinnatifid, 2–8.3 cm × 9–26 mm, margins (of lobes) entire or dentate. Cauline leaves shortly petiolate; blade oblanceolate to nearly linear, 1–4.5(–6.2) cm × 3–10(–17) mm, base attenuate to cuneate, not auriculate, margins entire or dentate. Racemes much-elongated in fruit; rachis pubescent, trichomes curved, with fewer and longer, straight ones. Fruiting pedicels usually divaricate, rarely horizontal, straight or slightly recurved, (terete), (2.5–)3–4.1(–4.7) × 0.2 mm, puberulent adaxially. Flowers: sepals oblong, 0.8–1 × 0.2–0.4 mm; petals (sometimes absent), white, oblanceolate, 0.4–1.6 × 0.1–0.8 mm, claw absent; stamens 2, median; filaments 0.8–1 mm; anthers 0.1–0.2 mm. Fruits elliptic-obovate to obovate-orbicular, 2.4–3.2 × 1.8–2.5 mm, apically winged, apical notch 0.2–0.5 mm deep; valves thin, smooth, not veined, sparsely puberulent, (trichomes often antrorsely appressed, sometimes restricted to margin); style 0.05–0.1 mm, included in apical notch. Seeds ovate, 1.4–1.6 × 0.7–0.9 mm.
Phenology: Flowering Mar–Jun.
Habitat: Disturbed grounds, railroad tracks and embankments, fields, knolls, stream banks, waste areas, open banks, roadsides, sandy terraces
Distribution
![V7 926-distribution-map.gif](/w/images/7/70/V7_926-distribution-map.gif)
Kans., La., Miss., N.Mex., Okla., Tex., Mexico (Coahuila, Nuevo León, San Luis Potosí).
Discussion
Selected References
None.