Thelypodiopsis elegans |
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Westwater tumble-mustard |
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Habit | Annuals or biennials; pilose throughout or at least basally. |
Stems | branched basally and distally, 1.5–8.5(–12) dm, (sparsely to densely pilose basally or throughout, trichomes crisped). |
Basal leaves | (soon withered); rosulate; petiole 0.5–2.5(–5) cm; blade oblanceolate, 1–5.8 cm × 5–22 mm, margins entire or dentate, (surfaces glabrous or pilose abaxially). |
Cauline leaves | sessile; blade ovate to oblong, base auriculate, margins usually entire, rarely dentate, (surfaces glabrous or pilose abaxially). |
Racemes | dense. |
Flowers | sepals usually erect to ascending, rarely spreading, purplish to lavender or whitish, 4–7 × 1.2–2 mm; petals pale purple to white, spatulate, 7.5–14 × 3–5 mm, (margins not crisped), claw 4–8 mm; median filament pairs 4–8 mm; anthers linear, 2.5–4 mm; gynophore (stout), 0.3–1.5 mm. |
Fruiting pedicels | divaricate, straight or slightly upcurved, (3.5–)5–16 mm, (glabrous or sparsely pilose). |
Fruits | divaricate-ascending to spreading, straight or curved, torulose, 4–8(–9) cm × 1.2–1.5 mm; (valves glabrous or pilose); ovules 46–94 per ovary; style often clavate, 1–3 mm; stigma strongly 2-lobed. |
Seeds | 1.2–1.5 × 0.8–1 mm. |
Thelypodiopsis elegans |
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Phenology | Flowering Apr–Jun. |
Habitat | Shale grounds, loose gypsum, barren areas, clay banks of rocky hillsides, shrub communities |
Elevation | 1400-2400 m (4600-7900 ft) |
Distribution |
AZ; CO; UT; WY
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Source | FNA vol. 7, p. 726. |
Parent taxa | Brassicaceae > tribe Thelypodieae > Thelypodiopsis |
Sibling taxa | |
Synonyms | Thelypodium elegans, Sisymbrium elegans, Streptanthus wyomingensis, T. bakeri, T. wyomingensis, Thelypodium bakeri |
Name authority | (M. E. Jones) Rydberg: Bull. Torrey Bot. Club 34: 432. (1907) |
Web links |