阿拉善黄耆 a la shan huang qi

Astragalus chingianus E. Peter.

Plants 8-20 cm tall, caespitose, covered with appressed to subappressed hairs 0.1-0.3 mm. Stems 5-10 cm, loosely to rather densely white hairy. Leaves 2-6 cm, subsessile; stipules greenish, 2-3 mm, lower ones shortly connate behind stem, upper ones mostly free, sparsely to loosely hairy or only ciliate; rachis sparsely to rather densely hairy; leaflets in (3-)5-8 pairs, elliptic to obovate, 3-7 × 2-5 mm, abaxially sparsely to loosely hairy, adaxially glabrous or with scattered hairs, apex rounded to retuse or slightly emarginate. Racemes up to 2 cm, rather densely up to 20-flowered; peduncle 3-4 cm, white hairy like rachis; bracts whitish membranous, 0.8-1(-2) mm, black hairy or white ciliate. Calyx 2.5-3 mm, loosely white and/or black hairy; teeth unequal, 0.3-1 mm. Petals greenish yellow (ac­cording to collector), yellowish when dry; standard obovate to widely ovate, 7-8 × ca. 4 mm, apex deeply incised; wings 6-7 mm, limbs slightly emarginate; keel 4.5-5 mm. Legumes ses­sile, obliquely ellipsoid, ca. 4 mm, ca. 1.5 mm high and ca. 1 mm wide, keeled ventrally, rounded dorsally, with a short curved beak, 1-locular; valves covered on ventral side loosely with short appressed white hairs. Seed 1.

About 2000 m. Gansu, Nei Mongol, Ningxia, Xinjiang [Mongo­lia].