Tephrosia thurberi
Rhodora 51: 265. 1949.
Common names: Thurber’s hoary-pea
Basionym: Cracca thurberi Rydberg in N. L. Britton et al. N. Amer. Fl. 24: 165. 1923
Treatment appears in FNA Volume 11.
Herbs. Stems erect, 30–60 cm, hirsute to hirsute-villous. Leaves: petiole 10–30(–40) mm; leaflets (9–)11–27, blades elliptic to narrowly oblong, 15–30 × (5–)7–13 mm, length 2.5–3.5(–4) times width, apex obtuse to rounded, surfaces loosely strigose to sericeous. Racemes congested, 8–14-flowered, 2–4 cm; floral bracts setaceous, caducous. Flowers: corolla pink and pink-purple or yellowish, aging pink-purple, 15–18 mm; stamens weakly diadelphous; style bearded. Legumes 30–60 × 4 mm, villosulous.
Phenology: Flowering Jun–Sep.
Habitat: Oak or pine woodlands, roadsides.
Elevation: 1600–2000 m.
Distribution
Ariz., Mexico (Chihuahua, Sonora).
Discussion
Tephrosia thurberi is similar to T. virginiana but far disjunct and in a different biome. In the flora area, it is restricted to Cochise and Santa Cruz counties in southeastern Arizona.
Selected References
None.
Lower Taxa
None.