Tree 25-40(-45) m high and 45-80 cm in diam. Stipules lanceolate, 3-5 mm long, almost glabrous except slightly puberulous on the midrib beneath and on margins, caducous. Leaves (2-or) 3-(or 4-)jugate; petiole 1.5-2.8 cm and rachis 4-11 cm long, both minutely puberulous, glabrescent, or almost glabrous. Leaflets thinly to rigidly coriaceous, elliptic, obovate-or broad-elliptic, 2.5-5(-9.5) by 2-3(-5) cm; apex obtuse, acute, or shortly acuminate, sometimes slightly emarginate; base obtuse or cuneate, slightly asymmetric; glabrous on both surfaces, except sometimes sparsely hairy on the midrib of lower surface; petiolules very short, up to c. 4 mm, slightly puberulous, glabrescent or glabrous. Inflorescences paniculate, up to 16(-25) cm long, lateral branches up to over 5 cm long, both rachis and branches densely pubescent; bracts and bracteoles ovate, up to 4 mm long, densely puberulous; pedicels 1-1.5 mm, densely puberulous. Flowers yellow, yellowish brown. Calyx lobes elliptic or elliptic-oblong, obovate, or ovate, 4.5-5(-6) by 2-3(-3.5) mm, no spiny outgrowths on the outer surface, densely puberulous outside, appressed hairy insides. Petal 5-6 mm long, slightly longitudinally folded and somewhat bent inward from the middle, the lower half (claw) densely puberulous outside and glabrous inside, the upper half (limb) glabrous except villose margin. Stamens: united basal parts of the filaments 2-3 mm high; free filaments and staminodes up to c. 7 mm, ciliate; 2 largest anthers ellipsoid, 2-2.5 mm long, the others (much) smaller, up to 0.75 mm long. Ovary subsessile or shortly stipitate (c. 1 mm), slightly obovate or elliptic, c. 2 mm long, densely woolly along the margins; style 8-10 mm, glabrous; stigma obscure. Pods ellipsoid, ovoid, broadly ovoid, or suborbicular, 5-9 by 4.5-5.8 cm, flattened, smooth, obscurely veined, almost glabrous, beak up to 8(-14) mm long, recurvate, 1-3-seeded. Seeds broadly ovoid or suborbiculate, c. 13 (-21) mm long, smooth, black; aril broader than high, often larger than the seed, smooth or rugose.
Flat or sloping areas in lowland forest, occurring often on dry land, sometimes on sandy loam-soil, occasionally in secondary forest and seasonal freshwater swamp, at elevations that are usually below 100 metres, rarely up to 412 metres.
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