Tree up to 35 m, 50 cm ø. Twigs glabrous. Leaves 5-10(-12) by (l½-)2-5(-6) cm, shortly attenuate, sometimes acute at the base, acuminate to cuspidate at the top, with obtuse tip, coriaceous, conspicuously reticulate; nerves 8—12 pairs, flat above, prominent beneath; petiole 5-8 mm, c. 1-2 mm ø. Inflorescence (l-)2-4(-5) cm, consisting of a few, sometimes one 1-5 cm long rather coarse, sometimes stunted axes, each bearing 0-15 flowers. Bracts of the axes deltoid to triangular, c. 1 mm, obtuse at the top, subglabrous, mostly caducous. Floral bracts small, the middle one deltoid to triangular, c. 1 mm, the lateral ones minute. Pedicels 1-2½ mm, c. 1 mm Ø. Receptacle c. 3 mm high, 3-4(-5) mm wide, densely puberulous. Sepals c. 1 mm. Petals c. 6 mm, c. 1½ mm wide at the base, valvate at the base, conduplicate-valvate for the rest, more or less connate in the median part, mostly almost completely enveloping the stamens. Filaments 1½-2 mm long, ¾-l mm wide at the base, glabrous. Connective pear-or drop-shaped, c. l½ mm, with dorsal swelling. Anther-cells c. 1½,mm, c. ¼ mm wide. Style 2-5 mm, c. ½ mm Ø, protruding from mature bud. Ovules 2 per locule. Capsule 2-3½ by l½-2½ cm; rim of enlarged receptacle infra-median; valves ½-l(-l ½) cm. Seeds 0.7-0.8(-l) by 0.3-0.4(-0.5) cm; wing c. ½ cm wide.
Primary (dipterocarp) forest at low and medium altitude, up to 1200 m, also recorded from ultrabasic red-brown soil.
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