Thelypodiopsis aurea |
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Durango tumblemustard |
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Habit | Annuals or perennials; (short-lived); (glaucous), glabrous or sparsely pubescent basally. |
Stems | branched basally and distally, (1.4–)2–5(–6) dm, (glabrous or sparsely pubescent basally). |
Basal leaves | rosulate; petiole 0.5–4 cm; blade oblanceolate, 2–7 cm × 5–22 mm, margins irregularly dentate. |
Cauline leaves | sessile; blade lanceolate to oblong, (smaller distally), base auriculate, margins entire, (surfaces glabrous). |
Racemes | dense. |
Flowers | sepals spreading to reflexed, yellow, 5–7.5(–8.5) × 1.7–2.5 mm; petals yellow, spatulate to broadly oblong, 7–11(–13) × 2–3.5 mm, claw 5–7 mm (to 2 mm wide); median filament pairs 5–6.5 mm; anthers linear, 3–4 mm; gynophore (slender), 2–6(–8) mm. |
Fruiting pedicels | divaricate-ascending, straight, (5–)6.6–13(–15) mm. |
Fruits | erect to divaricate-ascending, straight or slightly curved, torulose, 5–7.5(–9) cm × 1.2–1.7 mm; ovules 72–98 per ovary; style subclavate, 0.5–2 mm; stigma 2-lobed. |
Seeds | 1.2–1.5 × 0.6–0.8 mm. |
2n | = 22. |
Thelypodiopsis aurea |
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Phenology | Flowering Apr–May. |
Habitat | Shrub communities on clay or, rarely, sandy soil |
Elevation | 1200-2200 m (3900-7200 ft) |
Distribution |
CO; NM; UT
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Discussion | Thelypodiopsis aurea is restricted to the Four Corners area and is known only from Montezuma County in Colorado, Sandoval and San Juan counties in New Mexico, and San Juan County in Utah. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 725. |
Parent taxa | Brassicaceae > tribe Thelypodieae > Thelypodiopsis |
Sibling taxa | |
Synonyms | Thelypodium aureum, Sisymbrium aureum |
Name authority | (Eastwood) Rydberg: Bull. Torrey Bot. Club 34: 432. (1907) |
Web links |