毛瓣棘豆 mao ban ji dou

Herbs, 10-35 cm tall, acaulescent, from a branching cau­dex, tufted, sometimes with persistent petioles and peduncles of previous seasons, ± grayish. Stipules narrowly elliptic, 8-15 × 2.5-3 mm, silvery or buff-colored villous, apex acuminate. Leaves 7-20 cm, 13-31-foliolate; leaflets sessile or subsessile; leaflet blades elliptic to ovate-lanceolate, 0.6-2.5 × 0.2-0.7 cm, both surfaces silvery or buff-colored tomentose, apex acute. Racemes many flowered; peduncle 18-25 cm, usually longer than leaves, silvery or buff-colored villous-tomentose; bracts linear, 2.5-3 × 1-1.5 mm, villous, apex acuminate. Calyx cylindric, 8-10 × 2-4 mm, silvery villous; tube ca. 3.5 × 1-2 mm; lobes linear, 4.5-5 × ca. 1.2 mm. Corolla purple, bluish purple, violet, blue, or rarely white; standard 0.9-1.2 cm, lami­na obcordate, 8-10 × 6-7 mm, and outside sericeous-villous; wings 1-1.2 cm, apex rounded; keel 8-10 mm, beak ca. 0.3 mm. Legume shortly stipitate; body ellipsoid-ovoid, 6-7 × 4-5 mm, slightly inflated, densely whitish villous. Fl. Jun-Sep, fr. Aug-Sep. 2n = 16*.

● Sandy sites and sand dunes, hills, grasslands, gravelly flooded places; 2600-4600 m. Xizang.