Herb, spreading or climbing by tendrils. Leaf pinnately compound, rachis ending in a bristle or tendril, leaflets 2-8, stipules foliaceous. Inflorescence a solitary or few-flowered axillary raceme. Bracts small, caducous, bracteoles absent. Calyx tube oblique, teeth subequal. Vexillum broad, with a claw. Wing bigger than keel and attached to the keel. Stamens diadelphous or monadelphous, anthers uniform. Ovary subsessile, many-ovuled, style bearded lengthwise on the inner side, stigma subterminal. Fruit compressed, 2-valved, seeds subglobose, funicle dilated into an aril, covering the hilum.