Description from Flora of China
Shrublets. Stems conspicuous. Stipules 2, opposite petiole, scarious, connate or free, deciduous. Leaves imparipinnate; leaflet blades opposite, margin entire. Racemes axillary, lax, many flowered; bracts marcescent or caducous. Bracteoles 2 at base of calyx. Calyx campanulate or obliquely campanulate; teeth 5, unequal or subequal. Corolla purple or pinkish purple, marcescent on mature legumes; standard longer than wings, slightly longer than keel, not turned backward at anthesis; keel with claw longer than half of lamina. Stamens diadelphous (9+1). Ovary sessile, hairy. Legume articulate, divided into several articles, indehiscent, adaxial suture grooved; articles compressed or biconvex, lanate, pubescent, or glabrous, with or without prickles.
Five species: China, Kazakhstan, Mongolia, Russia; five species (one endemic) in China.
(Authors: Xu Langran (徐朗然 Xu Lang-rang); Byoung-Hee Choi)