Tree to 27 m high and 38(-50) cm in diam.; buttresses steep, 1.5 m high and 30 cm extending outwards from the base. Stipules intrapetiolar, minute, c. 1 mm long, caducous. Leaves 2-4-foliolate, shortly petioled; petiole and rachis 1.5-7 cm long, not prolonged beyond the upper petiolule. Leaflets firmly chartaceous, elliptic-or ovate-oblong, 7-20 by 3-7 cm, the lower ones usually smaller; apex acuminate or rather abruptly acuminate; base cuneate, acute, obtuse, or rounded, symmetric or slightly unsymmetric; glabrous; nerves 5-7 per side; petiolules short, c. 5 mm, glabrous. Inflorescences axillary, up to 24 cm long, glabrous, loosely flowered; bracts triangular, up to c. 1.5 mm long, glabrous, caducous; bracteoles spaciously alternate at the lower half, or subopposite or opposite at the base, of the pedicel, triangular, minute, c. 0.2 mm long, glabrous, caducous; pedicels (7-)15-22(-30) mm, articulated at the base, glabrous. Flowers greenish white, greenish yellow, or white, scented, glabrous outside. Hypanthium c. 2 mm long. Calyx lobes elliptic or ovate-oblong, 4-4.5 by 2-2.5 mm, the inner surface often puberulous on the longitudinal, central part, glabrescent, sometimes almost glabrous on some of the flowers. Stamens (8-)10; filaments up to c. 12 mm, glabrous; anthers 0.7-1 mm long. Pistil stipitate; stipe free, c. 1.5 mm long, glabrous; ovary c. 3 mm long, (2-) 4-(or 5-)ovuled; style up to c. 14 mm, glabrous except often hairy towards the base; stigma obscure, slightly thicker than the style. Pods ellipsoid or fusiform, 5-8 by 2.5-3.5 cm, swollen, 1.8-2.5 cm thick, gradually narrowed from the middle towards both ends, or beaked at apex and obtuse at base, shortly brown hairy, valves 2, coriaceous, hard, 1-or 2-(or more-)seeded. Seeds transverse-oblong or slightly reniform, 2-2.2 by 3-3.7(-4.7) cm, slightly swollen, 1.8-2.3 cm, thick, smooth, shining.
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