悬垂黄耆 xuan chui huang qi

Plants 30-35 cm tall, caespitose, with white hairs 0.1-0.3 mm, partly with some black hairs mixed in. Stems several to numerous, branched at base, rather densely covered with subap­pressed to spreading hairs. Leaves 3-7 cm, subsessile; stipules 2-3 mm, free, sparsely hairy; rachis slender, loosely to rather densely subappressed hairy; leaflets in 6 or 7 pairs, narrowly elliptic, 5-12 × 1.5-3 mm, abaxially loosely to rather densely subappressed hairy, adaxially glabrous, apex obtuse to slightly emarginate. Racemes 2-3 cm, densely many flowered, soon strongly elongating; peduncle 4-10 cm, loosely to rather densely covered with appressed white hairs 0.05-1.5 mm, toward ra­ceme sometimes also with black hairs; bracts whitish mem­branous, 1-1.5 mm, sparsely black ciliate. Flowers subsessile. Ca­lyx 2-2.5 mm, loosely covered with appressed black and a few white hairs 0.1-0.15 mm; teeth 0.3-0.5 mm. Petals orange; stan­dard 5-6 mm, limb obovate, 3-3.5 mm wide, apex slightly emarginate; wings 4.5-5.5 mm, limbs oblong, very deeply in­cised, often more than 1/2 of length, bifurcate, lower segment filiform to linear, upper distinctly wider; keel 4-4.5 mm. Leg­umes sessile, widely ellipsoid, ca. 4 mm, ca. 3 mm high and ca. 2 mm wide, slightly keeled ventrally, deeply grooved dorsally, rounded at apex, with a persistent style ca. 2 mm, 2-locular; valves finely transverse-rugulose, glabrous. Seed 1 in each locule.

● 2100-2900 m. Gansu, Qinghai.