太白山黄耆 tai bai shan huang qi

Plants 20-40 cm tall, loosely hairy. Stems ascending to erect, with appressed to subappressed white hairs 0.3-0.8(-1) mm. Leaves 3-9 cm; stipules 5-10 mm, sparsely hairy to sub­glabrous, ciliate; petiole 0.5-1.5 cm, with rachis hairy like stem; leaflets in 5-9 pairs, oblong to narrowly ovate, 5-20 × 2-8 mm, abaxially especially at midrib loosely covered with subap­pressed white hairs 0.2-0.5 mm, adaxially glabrous or more rarely with scattered hairs only, apex obtuse to retuse. Racemes loosely 7-12-flowered; peduncle 5-7 cm, hairy like stem; bracts membranous, narrowly triangular, 2-5 mm, white and black hairy. Calyx 5-6 mm, loosely, toward teeth more densely, covered with subappressed, predominantly black hairs 0.5-0.8 mm; teeth narrowly triangular, all close together at dorsal side, 0.5-2 mm. Petals violet; standard obovate, 12-14 × ca. 6 mm; wings 10-13 mm; keel 9-11 mm. Legumes subsessile, ovoid to ellipsoid, 10-12 mm, 5-6 mm high and wide, keeled ventrally, grooved dorsally, acuminate, 2-locular; valves glabrous.

● 2400-2900 m. Gansu, Shaanxi.