细梗黄耆 xi geng huang qi

Astragalus longicalyx C. C. Ni & P. C. Li.

Plants 30-70 cm tall; hairs thin, mostly spreading, in vege­tative parts only white, 1-4 mm. Stems in lower part often leaf­less, densely villous. Leaves 4-10 cm; stipules whitish mem­branous, linear-acute, 10-15 mm, free, hairy; petiole 1-2.5 cm, like rachis densely covered with spreading hairs 1-2 mm and with somewhat fewer hairs up to 4 mm; leaflets in 9-11 pairs, narrowly oblong to narrowly elliptic, 10-25 × 2-5 mm, abax­ially loosely to rather densely covered with spreading hairs up to 4 mm, adaxially glabrous, apex rounded to subobtuse, mi­nutely acuminate-mucronulate. Racemes loosely 3-6-flowered; peduncle 0.5-1 cm, with spreading white hairs; bracts whitish membranous, linear-acute, 10-18 mm, hairy. Calyx ca. 20 mm, covered with long, spreading, white hairs; teeth linear to subu­late, 10-12 mm. Petals yellow; standard elliptic, 20-22 × 7-9 mm, apex emarginate; wings ca. 18 mm; keel ca. 19 mm. Leg­umes with a curved stipe 4-5 mm, inflated ellipsoid, 20-30 mm, 12-14 mm high and wide, widely grooved ventrally and dor­sally, with a slightly curved beak ca. 5 mm, 2-locular; valves thin, rather densely villous, hairs very fine, tangled, ± spreading, 2-3 mm.

3000-5200 m. Xinjiang, Xizang [NW India].