奥尔格黄耆 ao er ge huang qi

Astragalus chionanthus Popov.

Plants subshrubby, acaulescent or shortly caulescent, 12-30 cm tall; hairs sparse, white, in inflorescence also black. Stem 1-10 cm, glabrous or very sparsely covered with appressed to spreading hairs 0.5-1 mm, at base very densely covered with remnants of old leaves and rigid but not spiny rachises. Leaves 6-10 cm, at end of vegetation period elongating up to 25 cm; stipules whitish hyaline, lower ones 5-6 mm, upper ones up to 15 mm, shortly ciliate or rarely glabrous; petiole 1-3 cm, later up to 6 cm, like rachis slender, later thickened and hardening, persistent, glabrous or very sparsely subappressed hairy; leaflets in 13-15 pairs, easily falling, narrowly oblong, 3-18 × 1-3 mm, glabrous or abaxially very sparsely hairy, apex rounded to in­cised. Racemes loosely 2-4-flowered; peduncle 1-3.5 cm, gla­brous; bracts whitish membranous, linear, acute, 6-10 mm, mostly glabrous. Calyx 13-15 mm, at base nearly glabrous, up­per part sparsely to very loosely black hairy; teeth 3-5.5 mm. Petals whitish or yellow; standard obovate-oblong, 25-28 × 8-13 mm, lower part slightly constricted, scarcely to distinctly emarginate; wings 23-26 mm; keel 20-22 mm. Legumes with a stipe 2-4 mm, globose to inflated ellipsoid, 10-25 mm, 10-12 mm high and 10-18 mm wide, slightly grooved ventrally and dorsally, with a beak 2-4 mm, 2-locular; valves thin, glabrous.

Stony slopes of high mountains; 3100-3900 m. Xinjiang [Kazakh­stan, Kyrgyzstan, Tajikistan, Uzbekistan].