Large unbuttressed tree. Twigs, leaf buds, midrib above, petioles, inflorescences, flower calyx and petals outside densely persistently evenly pale golden-brown pubescent, leaf beneath and fruit calyx sparsely somewhat caducously so. Twig c. 3 mm Ø apically, terete, pale brown, much branched. Buds to 10 by 4 mm, ovoid to lanceolate, acute; stipule to 5 by 1 cm, lorate, tapering and subacute apically. Leaves 5.5-17 by 2.8-7 cm, ovate or elliptic, usually small, coriaceous; base obtuse or broadly cuneate; acumen to 6 mm long, short; nerves 11-13(-15) pairs, ascending; tertiary nerves slender, elevated beneath; petiole 1.5-2.8 cm long, slender. Inflorescence to 7 cm long, singly branched or unbranched, bearing to 7 distichous flowers. Flower buds to 25 by 8 mm, fusiform. Stamens 18-20, shorter than style at anthesis; filaments short, lorate; anthers short, linear-lorate, tapering; appendage acicular, very slender, c. ⅔ length of anther; ovary ovoid, tapering into the columnar style; ovary and basal ½ of style densely pubescent. Fruit pedicel to 3 by 2 mm; calyx tube to 2 cm ø, ± subglobose, with 5 continuous, to 2 mm wide, narrow coriaceous wings; 2 longer lobes to 11.5 by 2.5 cm, lorate-oblong, narrowly obtuse, c. 8 mm wide at the subrevolute base; 3 shorter lobes to 15 by 15 mm, suborbicular, revolute, prominent.
Scattered in Hill and upper Dipterocarp forests, 600-1000 m, and down to sea level in seasonal areas in N.W. Malaya. Gregarious in lowland and hill Semi-evergreen Dipterocarp forest of S.E. Asia.
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A canopy tree, scattered in hill and upper Dipterocarp forests at elevations from 600-1,000 metres in areas with year round rain, but descending to sea level in areas with a dry season.
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