青藏黄耆 qing zang huang qi

Astragalus corydalinus Bunge.

Plants 25-70 cm tall, covered with mostly ± medifixed hairs. Stems several, 20-60 cm, often with very short lateral branches, densely hairy; hairs appressed, often flexuous, white, at nodes also black, 0.3-0.5 mm, a few ascending up to 1 mm. Leaves 5-10 cm, subsessile; stipules 6-8 mm, high vaginate-connate behind stem, loosely to rather densely appressed hairy; rachis rather densely white hairy; leaflets in 7-13 pairs, nar­rowly elliptic, 7-19(-25) × 1.5-7 mm, abaxially loosely to densely appressed hairy, adaxially glabrous or subglabrous, apex rounded or obtuse, mostly very shortly mucronulate. Ra­cemes up to 10 cm, rather densely many flowered; peduncle 6-23 cm, hairy like stem; bracts 3-5 mm, black and white hairy. Bracteoles 1-2 mm. Calyx 8-10 mm, loosely covered with ap­pressed to ascending, mostly asymmetrically bifurcate to sub­basifixed, black or mixed white and black hairs; teeth unequal, 1-2 mm. Petals greenish white, standard often ± purple tinged; standard obovate, 14-17 × 6-8 mm, apex emarginate; wings 12-13 mm; keel 11-12 mm. Legumes sessile, nodding, 11-20 mm, 4-5 mm high and 5-6 mm wide, with a beak 1-2 mm, 1-locular to incompletely 2-locular; valves densely black and white hairy, glabrous with age.

Steppes, open scrub and woodlands; 1100-3700 m. Qinghai, Xi­zang [Afghanistan, India, Kashmir, Kazakhstan, Kyrgyzstan, Pakistan, Tajikistan, Uzbekistan].