Shrubs. Supra-axillary buds covered with many conspicuous subulate cataphylls. Stipules present, persistent or caducous. Leaves spirally arranged, imparipinnate; stipels filiform in Chinese species, persistent; leaflets opposite, rather larger pairs at middle of leaf rachis, basal 1 or 2 pairs rather smaller. Pseudoracemes cauliflorous or axillary on branchlets of previous year. Bracts shorter than corresponding flower buds. Calyx indistinctly 5-toothed. Petals clawed, sericeous at basal and apical margins; standard reflexed at base, without basal calluses. Stamens diadelphous; vexillary stamen free from other 9. Ovary sessile, with trichomes, with 2(or 3) ovules. Legume clavate, flat, thinly woody, without wings. Seeds 1 or 2 per legume, lenticular, smooth; radicle folded.
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