Small tree up to 12 m by 10 cm ø, sometimes with swollen stem-base (in swamp!), bark smooth. Branchlets terete, sometimes slightly angular or compressed, light to dark-brown, usually swollen at the node. Leaves usually coriaceous, rigid, rarely subcoriaceous, ovate-oblong, 4.5-12.5 by 2-6 cm; base cuneate or obtuse; apex acuminate; nerves 4-11 pairs, elevated or fiat on both surfaces, sometimes obscure beneath, obliquely spreading and slightly curved to the margin; petiole short, c. 3(-8) mm, +-terete, stout. Panicles up to 10 cm, usually stout, solitary, sometimes branched almost from near the base. Peduncle very short, sometimes up to 3.5 cm. Pedicels 2-3 mm. Flowers yellowish green, 3.5-6 mm ø. Calyx lobes and petals with small, papillalike processes outside. Calyx lobes ovate or triangular, c. 1 1/3-1½ by 1 mm, apex acuminate, ± pointed and turning upward at ± right angles, short-ciliate. Petals triangular or suborbicular, 1-2.5 by 1-2 mm. Stamens c. 1 mm long; anthers small, very short-apiculate. Disk ± fiat, suborbicular or obscurely 5-angular, 1.5-3.5 mm ø, smooth, or sometimes slightly tuberculate on the upper surface. Pistil c. 1 mm emerging from the disk, pyramidal, at the apex contracted into a short but distinct cylindrical style. Ovules 4(-6) in each cell. Fruits up to 11 cm long, short-tuberculate on the outer surface. Seeds including wing 5.5 by 1.5 cm.
Understorey tree of freshwater-swamp forests, also on dryland, in heath forest; all in the lowland, thrice found on hill top at 650, 1000, and 1380 m.
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