Thelypodiopsis ambigua |
Thelypodiopsis aurea |
|
---|---|---|
Long Valley tumble-mustard |
Durango tumblemustard |
|
Habit | Annuals or biennials; (glaucous), glabrous throughout. | Annuals or perennials; (short-lived); (glaucous), glabrous or sparsely pubescent basally. |
Stems | branched distally, (3–)5–10 dm. |
branched basally and distally, (1.4–)2–5(–6) dm, (glabrous or sparsely pubescent basally). |
Basal leaves | rosulate; petiole 0.3–3 cm; blade oblanceolate, (1.5–)2.5–14.5(–20) cm × 10–30(–42) mm, margins dentate to subpinnatifid. |
rosulate; petiole 0.5–4 cm; blade oblanceolate, 2–7 cm × 5–22 mm, margins irregularly dentate. |
Cauline leaves | sessile; blade lanceolate to oblong, base auriculate, margins usually entire, rarely dentate. |
sessile; blade lanceolate to oblong, (smaller distally), base auriculate, margins entire, (surfaces glabrous). |
Racemes | lax or dense. |
dense. |
Flowers | sepals erect, purple, 5–7.5 × 1.7–2.5 mm; petals purple to lavender or white, spatulate, 10–14 × 1.2–1.7 mm, claw 4–6 mm; median filament pairs 4–6 mm; anthers linear, 3–4 mm; gynophore (slender), 3–6(–9.5) mm. |
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 | horizontal to divaricate-ascending, often upcurved, 6–9 mm. |
divaricate-ascending, straight, (5–)6.6–13(–15) mm. |
Fruits | ascending to divaricate or descending, straight or slightly recurved, torulose, 4.5–9 cm × 1.1–1.4 mm; ovules 80–112 per ovary; style cylindrical, (stout), 0.3–1 mm; stigma 2-lobed. |
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 × 0.8–1.2 mm. |
1.2–1.5 × 0.6–0.8 mm. |
2n | = 22. |
= 22. |
Thelypodiopsis ambigua |
Thelypodiopsis aurea |
|
Phenology | Flowering Mar–Jun. | Flowering Apr–May. |
Habitat | Pinyon-juniper desert shrub communities, dry hillsides | Shrub communities on clay or, rarely, sandy soil |
Elevation | 800-1600 m (2600-5200 ft) | 1200-2200 m (3900-7200 ft) |
Distribution |
AZ; UT
|
CO; NM; UT
|
Discussion | Of conservation concern. Thelypodiopsis ambigua is known from Kane County in Utah and from Coconino, Mohave, and Yavapai counties in Arizona. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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. | FNA vol. 7, p. 725. |
Parent taxa | Brassicaceae > tribe Thelypodieae > Thelypodiopsis | Brassicaceae > tribe Thelypodieae > Thelypodiopsis |
Sibling taxa | ||
Synonyms | Thelypodium ambiguum, Sisymbrium ambiguum, T. ambigua var. erecta | Thelypodium aureum, Sisymbrium aureum |
Name authority | (S. Watson) Al-Shehbaz: Contr. Gray Herb. 204: 138. (1973) | (Eastwood) Rydberg: Bull. Torrey Bot. Club 34: 432. (1907) |
Web links |