Tree 18-33 m high and 31-95 cm in diam.; buttresses 60 cm high and spread. Stipules caducous, not seen. Leaves 3-or 4-jugate; petiole (1.5-)2.5-4 cm and rachis 5.5-10(-14) cm long, glabrous. Leaflets coriaceous, elliptic, ovate, or slightly obovate, (3.5-)5-10(-15) by (2-)3-5(-7.5) cm; apex shortly acuminate or acuminate, rarely rotund or retuse; base acute, cuneate, obtuse, or rotundate, sometimes unequally sided and often almost glabrous on both surfaces; petiolules very short, up to c. 5 mm, glabrous. Inflorescences paniculate, up to 20(-30) cm long, lateral branches up to 7 cm long, both rachis and branches densely puberulous; bracts and bracteoles ovate or lanceolate, 1.5-3 mm long, densely puberulous; pedicels 1-2.5 mm, densely puberulous. Flowers yellow, fragrant. Calyx lobes elliptic or lanceolate, 6.5-7.5 by 2.5-3 mm, outside densely puberulous and without spiny outgrowths, densely appressed hairy inside. Petal slightly obovate-oblong, 6.5-7.5 by 3-3.5 mm; outside densely puberulous; inside glabrous except margin villose. Stamens: united basal parts of the filaments c. 2 mm high; free filaments and staminodes up to c. 12 mm, sparsely hairy often at lower part or at base, or glabrous; two largest anthers ellipsoid, c. 3.5 mm long, the others smaller, up to 1.5 mm long. Ovary subsessile, slightly ellipsoid, c. 4 mm long, densely woolly along the suture, 4-or 5-ovuled; style up to c. 10 mm, glabrous; stigma small. Pods (young) ellipsoid or slightly broadly ellipsoid, 7-10 by 4-6 cm, flattened, often unequally sided, slightly minutely hairy, faintly veined, unarmed, beak slightly curved, c. 8 mm. Seeds 2 or 3, arillate.
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