Ovary linear, 3–8-ovuled, with a thickened glabrous area forming a small boss at the base of the style; style thickened below, bent over at an angle of up to 90°, glabrous; stigma small, capitate, glabrous.
Inflorescences axillary, falsely racemose, the flowers in fascicles along the rhachis which is slightly thickened at the insertion of the pedicels; bracts soon falling; bracteoles absent.
Corolla rather small; standard round, auriculate at the base, without appendages, glabrous; wings long-spurred at the junction of blade and claw.
Leaves pinnately 3-foliolate, very unusually 1-foliolate or 4–5-foliolate; stipules not spurred, persistent; stipels present.
Seeds 3–8, subglobose or ovoid-oblong, compressed; hilum short; a small cartilaginous funicle remnant persisting.
Calyx 5-lobed, 2-lipped, the lower lip 3-fid, the upper pair of lobes joined to form a bifid lip.
Prostrate trailers or lianes, more rarely erect subshrubs, from an extensive rootstock.
Vexillary stamen free or fused at the base; anthers uniform.
Pods linear-oblong to oblong, dehiscent, usually septate.