Giant tree up to 75(-88) m high, 1( — 2.7) m in diam.; buttresses steep, thick and up to 12 m high; bole straight, smooth and cylindric. Stipules oblong, 2-4.5 mm long, pubescent outside. Leaves 7-12(-17)-foliolate, rachis slender 6-7.5 cm, pubescent, glabrescent; petiole c. 1.5 cm; petiolules short, 1-2.5 mm, pubescent. Leaflets elliptic oblong, sometimes elliptic, symmetrical, 3.1-3.7(-4.2) by 1 — 1.4( — 1.7) cm; base subrotundate to cuneate; apex obtuse or acute and slightly notched; glabrous except sparsely hairy above, densely pubescent beneath. Inflorescences up to 11 (-12.5) cm long, rachis pubescent, densely flowered; pedicels c. 1.5 mm, densely puberulous. Calyx lobes lanceolate, equally sized, 2.5-3.25 mm long, thinly puberulous outside. Petals oblong or narrow-elliptic, 2.5-3 by 0.5 mm, acute or acuminate at the apex, glabrous. Stamens slightly longer than the petals; filaments stout, about as long as the anthers; anthers oblong, 2-3 mm long, glabrous. Ovary sessile, oblong or obovate-oblong, compressed, glabrous except some hairs at the basal part; style very short (c. 0.3 mm) and stigma indistinct. Pods oblong or elliptic-obovate, 8-12.5 by 2-3.5 cm (including the wing), strongly veined, glabrous. Seeds very flat, compressed, oblong, 2-3 by 1 cm.
An emergent tree in lowland primary forest, growing on alluvial sites and hillsides, often on limestone; at elevations up to 300 metres. The trees are often fond remaining in areas of secondary growth because they are rarely felled.
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