Evergreen trees, to18 m high, bark 10-12 mm thick, surface grey, smooth, speckled with brown; branchlets lenticellate. Leaves imparipinnate, alternate, leaflets 5-7, opposite, estipellate; petiolule 6-10 mm; slender, pubescent; leaflet elliptic-acuminate, elliptic-lanceolate, ovate or ovate-oblong, apex acuminate, margin entire, glabrous, chartaceous; stipules lateral, small, oblong, cauducous; rachis slender, pulvinate, pubescent; lateral nerves 5-8 pairs, pinnate, ascending, slender, faint; intercostae reticulate, obscure. Flowers bisexual, purplish-white; bracts small, cauducous. Calyx tube campanulate; minutely 5 toothed, apex truncate; corolla exserted. Petals 5, clawed; standard suborbicular with curved folds above the claw; wings obliquely oblong, slightly adnate above the claws to the obtuse keel petals which are joined near the tip. Stamens 10, monadelphous, the vexilary stamen free below and above; anthers uniform. Ovary subsessile, inferior, 1-celled, ovules 2; style in curved, beardless; stigma capitate. Fruit a pod, obliquely oblong, fiat, thick, pointed at both ends, indehiscent, slightly falcate; seed one, reniform.