Lepidium eastwoodiae |
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mesa pepperwort |
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Habit | Annuals, biennials, or perennials; (base woody); glabrous or pubescent. |
Stems | simple from base, erect, branched distally, (3.5–)4.5–16(–18) dm. |
Basal leaves | (soon deciduous), not rosulate; petiole (1–)2–5.5(–7.5) cm; blade pinnatifid, (2–)3–6.8(–9) cm × 10–30 mm, margins (of lobes) dentate to serrate. |
Cauline leaves | shortly petiolate or sessile; blade narrowly lanceolate or oblanceolate to linear, 3–7 cm × (2.5–)4–10mm (smaller distally), base attenuate to cuneate, not auriculate, margins usually entire, rarely dentate. |
Racemes | elongated in fruit; rachis puberulent, trichomes straight or curved. |
Flowers | sepals suborbicular to oblong, 0.8–1.5 × 0.7–1.2 mm; petals white, suborbicular, 2.2–3.5(4) × 1.5–2.5 mm, claw 0.7–1.5 mm; stamens 6; filaments 1.5–2.5 mm, (glabrous); anthers 0.3–0.4 mm. |
Fruiting pedicels | divaricate-ascending to horizontal, usually slightly recurved or somewhat sigmoid, rarely straight, (not winged), (3–)3.5–7.5(–8) × 0.2–0.3 mm, puberulent adaxially. |
Fruits | broadly ovate, 2–3.5(–4) × 1.8–2.6(–3) mm, apically winged, apical notch 0.1–0.2mm deep; valves thin, smooth, not veined, glabrous; style (0.2–)0.3–0.6(–0.7) mm, exserted beyond apical notch. |
Seeds | (dark brown), ovate, 1.4–1.8 × 0.8–1.1 mm. |
Lepidium eastwoodiae |
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Phenology | Flowering Jul–Sep. |
Habitat | Pinyon-juniper, sagebrush, or mixed desert shrub communities |
Elevation | 900-2200 m (3000-7200 ft) |
Distribution |
AZ; CO; NM; UT
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Discussion | C. L. Hitchcock (1936) and R. C. Rollins (1993) reduced Lepidium eastwoodiae to a variety of L. montanum and L. alyssoides, respectively. However, the differences in morphology and flowering periods support its recognition as an independent species. We have not examined the holotype of Lepidium moabense and follow N. H. Holmgren (2005b) in reducing it to synonymy of L. eastwoodiae. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 581. |
Parent taxa | Brassicaceae > tribe Lepidieae > Lepidium |
Sibling taxa | |
Synonyms | L. alyssoides var. eastwoodiae, L. moabense, L. montanum var. eastwoodiae |
Name authority | Wooton: Bull. Torrey Bot. Club 25: 258. (1898) |
Web links |