贺兰山棘豆 he lan shan ji dou

Herbs, 5-10 cm tall, acaulescent, from a much-branched multiheaded caudex, clothed with marcescent stipules and leaf bases. Stipules ovate, membranous, adnate to petiole, basally connate. Leaves 5-10 mm, 7-19-foliolate; leaflet blades ovate to elliptic-ovate, 2-3 × ca. 1 mm, both surfaces densely appressed white pilose, base rounded, apex acute. Racemes rather compact, 10-15-flowered; peduncle 2-8 cm, much longer than leaves, slender; bracts linear-lanceolate. Calyx campanulate, 2.5-3 mm, densely appressed white and black pilose; lobes linear, ca. 1 mm. Corolla yellow; standard ca. 7 mm, lamina obovate, apex emarginate; wings ca. 5 mm; keel slightly shorter than wings, beak ca. 1 mm. Ovary pilose. Leg­ume unknown. Fl. Jul-Aug.

● Valleys, stony hillsides; 2000-2400 m. SW Nei Mongol (Helan Shan), Ningxia.