Description from Flora of China
Herbs or subshrubs. Leaves pinnately 3-foliolate or sometimes only 1-foliolate, stipulate and stipellate. Inflorescences terminal, racemose; bracts scarious, deciduous. Flowers small. Calyx campanulate; lobes long, upper 2 nearly connate. Corolla pale violet, obviously exserted; petals nearly equal; standard nearly orbicular, base attenuate; wings connate; keel obtuse. Stamens diadelphous (9+1); anthers uniform. Ovary sessile, many ovuled; style filiform, incurved; stigma capitate, small. Legume oblong, turgid, not jointed, transversely veined, dehiscent, not transversely septate, 8-10-seeded.
One species: tropical Africa, Asia to E Australia.
(Authors: Huang Puhua (黄普华 Huang Pu-hwa); Hiroyoshi Ohashi)