贵南棘豆 gui nan ji dou

Herbs, 8-11 cm tall, acaulescent, from a multiheaded cau­dex clothed with marcescent stipules and petioles. Stipules nar­rowly triangular, ca. 10 × 3 mm, membranous, adnate to peti­ole, connate to above middle. Leaves 3-10 cm, 9-15-foliolate; petioles 2-5 cm, densely white pilose; leaflet blades narrowly elliptic, 5-16 × 1-3.5 mm, both surfaces densely appressed pi­lose, base rounded to cuneate, apex acute to obtuse. Racemes compact, 3- or 4-flowered; peduncle 6-8 cm, with dense whitish trichomes; bracts oblong to broadly lanceolate, 5-7 × ca. 1.5 mm, with whitish and blackish trichomes. Calyx sub­cylindric, 12-14 × 4-5 mm, with spreading dense white and black trichomes; lobes subulate, 3-4 × ca. 0.5 mm, ca. 1/3 as long as tube. Corolla purple; standard 2.2-2.4 × 0.5-0.7 cm, lamina obovate, basally tapering and constricted above middle hence becoming 3-lobed, apex truncate and slightly retuse; wings 2-2.2 cm, lamina ca. 7 mm wide, apex rounded; keel 1.6-1.8 cm, beak 3-3.5 mm. Legume unknown. Fl. Jul.

● Deserts; ca. 3200 m. Qinghai (Guinan).