Thelypodiopsis aurea |
Thelypodiopsis vaseyi |
|
---|---|---|
Durango tumblemustard |
Las Vegas tumblemustard |
|
Habit | Annuals or perennials; (short-lived); (glaucous), glabrous or sparsely pubescent basally. | Annuals; (often glaucous), glabrous throughout. |
Stems | branched basally and distally, (1.4–)2–5(–6) dm, (glabrous or sparsely pubescent basally). |
unbranched or branched distally, 3–10 dm. |
Basal leaves | rosulate; petiole 0.5–4 cm; blade oblanceolate, 2–7 cm × 5–22 mm, margins irregularly dentate. |
(soon withered); not rosulate; blade oblong to lanceolate or oblanceolate, 3–6 cm × 5–15 mm, margins usually entire, rarely denticulate. |
Cauline leaves | sessile; blade lanceolate to oblong, (smaller distally), base auriculate, margins entire, (surfaces glabrous). |
sessile; blade (proximalmost) oblong to lanceolate or oblanceolate, or (distal) linear to narrowly oblong or lanceolate, base auriculate, margins usually entire, rarely denticulate. |
Racemes | dense. |
lax. |
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. |
sepals spreading, whitish or purplish, 1.8–2.5 × 0.7–1 mm; petals white, obovate to spatulate, 2.5–4.5 × 1.7–2.5 mm, claw 1–1.5 mm; median filament pairs 1.7–2.5 mm; anthers ovate, 0.5–0.8 mm; gynophore 0.2–0.4 mm. |
Fruiting pedicels | divaricate-ascending, straight, (5–)6.6–13(–15) mm. |
horizontal to divaricate, straight or slightly recurved, (slender), 7–15 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. |
erect to ascending, straight or curved, strongly torulose, 1.5–2.5 cm × 1–1.2 mm; ovules 20–32 per ovary; style cylindrical, 0.5–0.8 mm; stigma obscurely 2-lobed. |
Seeds | 1.2–1.5 × 0.6–0.8 mm. |
1–1.5 × 0.7–0.9 mm. |
2n | = 22. |
= 20. |
Thelypodiopsis aurea |
Thelypodiopsis vaseyi |
|
Phenology | Flowering Apr–May. | Flowering Jul–Aug. |
Habitat | Shrub communities on clay or, rarely, sandy soil | Open wooded slopes, mixed coniferous forests, canyons |
Elevation | 1200-2200 m (3900-7200 ft) | 1900-2500 m (6200-8200 ft) |
Distribution |
CO; NM; UT
|
NM; TX
|
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.) |
Thelypodiopsis vaseyi is known from Lincoln, Otero, and San Miguel counties in New Mexico and Culberson County in Texas. R. C. Rollins (1982b, 1993) did not record it from Texas; the first report from there is based on Johnston 3148 (MO), collected in Guadalupe Mountains. Sisymbrium watsonii Payson is an illegitimate name that pertains to S. vaseyi. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 725. | FNA vol. 7, p. 727. |
Parent taxa | Brassicaceae > tribe Thelypodieae > Thelypodiopsis | Brassicaceae > tribe Thelypodieae > Thelypodiopsis |
Sibling taxa | ||
Synonyms | Thelypodium aureum, Sisymbrium aureum | Sisymbrium vaseyi |
Name authority | (Eastwood) Rydberg: Bull. Torrey Bot. Club 34: 432. (1907) | (S. Watson ex B. L. Robinson) Rollins: Contr. Gray Herb. 206: 12. (1976) |
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