Lianas, scandent shrubs, or rarely trees. Stipules glabrous, mostly deciduous. Leaves imparipinnate; stipels narrowly triangular, persistent or deciduous; leaflets (sub)opposite. Flowers neither paired nor clustered, in axillary or terminal racemes, sometimes forming axillary or terminal panicles; bracts shorter or longer than corresponding flower, usually deciduous; bracteoles on calyx or rarely on distal part of pedicel, persistent or not. Calyx usually truncate with short teeth. Corolla standard glabrous to densely sericeous outside, Chinese taxa with or without basal calluses, basally reflexed; wings and keel petals ± equally long; wings often partially adnate to keel. Stamens diadelphous; vexillary filament free from other 9. Ovary sometimes stipitate. Legume indehiscent or tardily dehiscent, thin to thickly woody, flat or inflated; sutures not winged, sometimes thickened. Seeds 1-9 per legume, roundish; radicle folded.
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