Thelypodiopsis ambigua |
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Long Valley tumble-mustard |
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Habit | Annuals or biennials; (glaucous), glabrous throughout. |
Stems | branched distally, (3–)5–10 dm. |
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. |
Cauline leaves | sessile; blade lanceolate to oblong, base auriculate, margins usually entire, rarely dentate. |
Racemes | lax or 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. |
Fruiting pedicels | horizontal to divaricate-ascending, often upcurved, 6–9 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. |
Seeds | 1.2–1.5 × 0.8–1.2 mm. |
2n | = 22. |
Thelypodiopsis ambigua |
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Phenology | Flowering Mar–Jun. |
Habitat | Pinyon-juniper desert shrub communities, dry hillsides |
Elevation | 800-1600 m (2600-5200 ft) |
Distribution |
AZ; UT
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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.) |
Source | FNA vol. 7, p. 725. |
Parent taxa | Brassicaceae > tribe Thelypodieae > Thelypodiopsis |
Sibling taxa | |
Synonyms | Thelypodium ambiguum, Sisymbrium ambiguum, T. ambigua var. erecta |
Name authority | (S. Watson) Al-Shehbaz: Contr. Gray Herb. 204: 138. (1973) |
Web links |