Description from Flora of China
Plants 40-50 cm tall, sparsely furnished with appressed white and black hairs 0.1-0.2 mm. Stems erect, 35-40 cm, strongly branched, glabrous. Leaves 2-5 cm; stipules membranous, from widely triangular base somewhat abruptly subulate-acuminate, 2-3 mm, nearly free from each other, glabrous; petiole 0.5-1 cm, like rachis slender, glabrous; leaflets in (1 or)2 or 3 pairs, narrowly elliptic, 5-20 × 2.5-8 mm, abaxially glabrous or to loosely covered with ± appressed white hairs, adaxially glabrous, apex rounded to retuse. Racemes 3-14(-20) cm, loosely many flowered; peduncle 2-9 cm, subglabrous or sparsely to loosely covered with very short, subappressed to ascending, mainly black hairs; bracts 0.5-2 mm, glabrous or with a few black hairs. Calyx 2.5-3 mm, tube subglabrous or sparsely black hairy; teeth all close together at lower side, 0.1-0.5 mm, densely black hairy on outer and inner sides. Petals white, cream, orange, or red; standard suborbicular, ca. 6 × 4 mm, apex emarginate; wings ca. 6 mm; keel ca. 5 mm. Legumes with a stipe 0.5-1.5 mm, obovoid, 5-6 mm, 4-5 mm wide, slightly keeled ventrally, deeply grooved dorsally, rounded at apex, with a slender, persistent style, 2-locular; valves thin, cross-wrinkled, glabrous.
● 300-2000 m. Hebei, Nei Mongol, Ningxia, Shaanxi, Shanxi.