藏黄耆 zang huang qi

Plants 15-25 cm tall. Stems branched at base, sparsely to loosely covered with appressed to subappressed white hairs 0.4-0.7 mm, at nodes also with black hairs. Leaves 6-12 cm; stipules 6-9 mm, high vaginate-connate behind stem, sparsely to loosely appressed, mostly white hairy; petiole 1-3 cm, like rachis loosely white hairy; leaflets in 9-11 pairs, narrowly ellip­tic, 7-17 × 3-6 mm, abaxially sparsely furnished with appressed white hairs 0.5-1 mm, adaxially glabrous, apex rounded to slightly emarginate. Racemes ovoid, rather loosely 7-15-flow­ered; peduncle 5-6 cm, hairy like stem but in upper part with predominantly black hairs; bracts 2.5-3 mm, predominantly black hairy. Calyx 4-5 mm, rather densely covered with appressed black hairs 0.2-0.3 mm and with fewer, slightly longer white hairs; teeth 1.5-2 mm. Petals mauve with whitish center, keel purplish mauve; standard widely elliptic to trans­versely elliptic, 6-8 × ca. 5 mm; wings ca. 6 mm; keel ca. 5 mm. Legumes sessile, obliquely ellipsoid, 4-7 mm, 2-2.5 mm high and 2.5-3 mm wide, with a beak ca. 0.5 mm, incompletely 2-locular; valves loosely covered with subappressed white or black hairs 0.2-0.4 mm.

● Xizang.