高山黄耆 gao shan huang qi

Astragalus salicetorum Komarov.

Plants caespitose, mostly low, with ± appressed white and black hairs. Stems several to many, slender, prostrate to as­cending, 1-15(-20) cm, sparsely hairy. Leaves 2-8 cm; stipules 1.5-6 mm, lower high connate behind stem, upper shortly con­nate or free, all ciliate; petiole 0.5-4 cm, like rachis slender, sparsely to loosely hairy; leaflets in 7-12 pairs, narrowly elliptic, 5-15(-20) × 2-5(-7) mm, abaxially somewhat densely hairy, adaxially glabrous or sparsely hairy, more rarely rather densely hairy on both surfaces, apex rounded to slightly retuse. Racemes short, densely 5-15-flowered; peduncle 3-8(-15) cm, erect, sparsely to loosely white hairy, toward raceme increasingly black hairy; bracts triangular, 0.5-2 mm, black ciliate. Calyx 4-6 mm, appressed black hairy; teeth 1-3 mm. Petals violet with whitish base, wings often whitish, often yel­lowish when dry but mostly with violet-tipped keel; standard rhombic-elliptic to widely elliptic, 9-13 × 6-7.5 mm, apex emarginate; wings 7-12 mm; keel 9-12 mm, limbs triangular, 6-8 × 3-3.5 mm. Legumes nodding, with a stipe 2-5 mm, ellip­soid, 7-13 mm, 3-3.5 mm high and wide, attenuate at both ends, keeled ventrally, deeply grooved dorsally, with a short beak, 1-locular or nearly so; valves thin, loosely to rather densely cov­ered with appressed to semispreading black hairs. Seeds 2.5-3 × 2-2.5 mm, smooth.

Subarctic zone, subalpine to alpine meadows, in subarctic tun­dra. Xinjiang [Russia; C Asia, SW Asia (Caucasus), Europe, North America].