Tree to 10 m., branchlets glabrous to pubescent. Leaves glabrous, 1-to 3-foliolate; stipules setaceous; petiole with rachis 1-4 cm. long; rachis narrowly winged, auriculate at least at articulation of terminal leaflet; leaflets ovate to ovate-elliptic, rounded or cuneate at the base, obtusely short-acuminate, subcoriaceous, lustrous, the terminal leaflet 5-10 cm. long. Inflorescence axillary or terminal; the short slender, glabrous peduncles with 2-4 flowers; pedicels filiform, 1-1.5 cm. long; bracts small, setaceous; buds glabrous, subglobose, hardly 4 mm. in diameter. Flowers 1-petalate; petal orbicular, unguiculate, a little longer than the calyx; stamens 18-20, almost all equal, twice longer than the calyx; anthers ovate; ovary stipitate, narrow, glabrous, 5-to 6-ovulate, attenuate to a short style; stipe a little shorter than the calyx. Legume short-stipitate, obliquely ovoid, long-acuminate, 4-5 cm. long, thick and carnose; seed obliquely ovoid, the aril lacerate.
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A tree. It grows 10 m tall. The leaves have 1-3 leaflets. The end leaflets is 5-10 cm long. The fruit is a pod 4-5 cm long. The seeds are oval and at an angle.