二尖齿黄耆 er jian chi huang qi

Astragalus bicuspis Fischer.

Plants to 60 cm tall, mostly branched at base, with ± spreading hairs 0.4-2 mm, vegetative parts only white hairy. Stems of current year up to 40 cm, villous. Leaves 2.5-4.5 cm, spreading; stipules 4.5-9 mm, semiamplexicaul, adnate to peti­ole for 1.5-2 mm, ciliate, otherwise glabrous or hairy; petiole 0.5-1 cm; rachis thin, hairy, free spiny tip ± as long as upper­most leaflets; leaflets in 4-6 pairs, obovate, lower ones 5-11 × 3-4 mm, hairy on both surfaces or more rarely glabrous adaxi­ally, apex rounded to retuse. Racemes subsessile or with a pe­duncle rarely up to 1.4 cm, 1-3-flowered; bracts 3-5 mm, ciliate. Bracteoles sometimes present. Calyx 9-15 mm, rather densely white hairy, sometimes also with shorter black hairs; teeth 2.5-5 mm. Petals yellow, glabrous; standard obovate, 15-26 × 7-10 mm; wings 14-23 mm; keel 13-19 mm. Legumes subsessile, 10-15 mm, 3-5 mm high, compressed laterally, with a beak 2-5 mm, incompletely 2-locular; valves leathery, densely hairy.

1300-3300 m. Xizang [India, Kashmir].