Description from Flora of China
Shrubs or subshrubs, erect. Leaves 1-foliolate, stipulate and stipellate. Racemes terminal or axillary, rarely slightly branched panicles, 2-flowered at each bract; bracts large, early deciduous; bracteole absent. Calyx campanulate; lobes 5, upper 2 connate to apex or above middle. Standard obovate; wings auriculate at base of lamina, nearly not clawed; keel obtuse, clawed, not auriculate. Stamens diadelphous (9+1). Ovary shortly stipitate, 2- or 3-ovuled; style curved; stigma capitate; disk cylindric. Legume usually 3- or 4-jointed; articles compressed from front to back, beadlike, easily deciduous at maturity.
Two species: Cambodia, China, India, Indonesia, Laos, Myanmar, Thailand, Vietnam; two species (one endemic) in China.
(Authors: Huang Puhua (黄普华 Huang Pu-hwa); Hiroyoshi Ohashi, Yu Iokawa)