Giant tree up to 37(-50) m high; bole straight, smooth and cylindric, 1( — 1.2) m in diam.; butresses up to 0.75-5 m high, 3 m wide and 10 cm thick; branchlets glabrous or slightly pubescent. Stipules lanceolate, 1-2 mm long, puberulous outside. Leaves (3-)7-9(-13)-foliolate; rachis 8-10 cm, slightly and minutely puberulous, glabrescent; petiole 1-4 cm; petiolules short, 2.5-3.5 mm, densely minutely puberulous. Leaflets rather thin, chartaceous, elliptic, ovate-lanceolate, more or less symmetrical, (2.5-)4.5-8(-10.5) by (1 — )1.5 — 3.5 cm; base usually rounded; apex acute or acuminate, glabrous, glossy above, loosely minutely pubescent beneath. Inflorescences sometimes branched at the base and appearing as 2 together, 3-6(-10) cm long; rachis pubescent, loosely flowered; pedicels 8-10 mm. Calyx lobes lanceolate, 7-10 mm long, slightly puberulous outside. Petals creamy green or orange-yellow, lanceolate, 8-11 by 2 mm, acute or acuminate at the apex. Stamens 7-8 mm long; filaments slender, c. 2.5 mm, glabrous; anthers large, lanceolate, 5-6 mm long, usually hairy on the inner side, sharply and conspicuously apiculate. Ovary elliptic-lanceolate, c. 4 mm long, hairy at the basal part and along the margins, the apical part narrowed into the glabrous style (up to 9 mm) and indistinct stigma. Pods greenish brown, obovate-oblong, oblong, 9-15 by 2.5-5 cm (including the broad wing), the basal part not twisted, glabrous, veined. Seeds brown, very flat, broadly ovate, c. 3.5 by 2.5 cm.
A canopy and emergent tree in dense, primary rainforests, growing on coastal plain foothils and stony low hills at elevations up to 840 metres.
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