Twigs, leaf bud, stipule outside, and petiole very shortly densely evenly buff pubescent, leaf nervation beneath and stipule within sparsely so; nervation above caducously so. Twigs to 2 by 4 mm ø towards the compressed apices, much branched, slender, becoming terete; stipule scars slender, dark. Bud to 12 by 3 mm, slender, lanceolate, acute. Stipule to 8 by 1.2 cm, lorate, acute. Leaves 6-12 by 3.5-8 cm, broadly elliptic to obovate, thickly coriaceous, with broadly cuneate base and acute to shortly abruptly acuminate apex; prominently persistently folded between the 9-12 pairs of sharply ascending nerves; nerves at 35°-40°; tertiary nerves very slender, densely scalariform; petiole 1-2 cm long, short, drying densely buff pubescent. Raceme to 2.5 cm long, very short, axillary, terete, densely shortly evenly buff pubescent, unbranched, bearing to 3 distichous flowers. Flower bud to 3 by 0.8 mm. Calyx and corolla typical, calyx glabrous. Stamens c. 30, somewhat shorter than anther; anther narrowly oblong, tapering into the acicular appendage; appendage as long as anther, prominent. Ovary ovoid, pubescent; style filiform, pubescent except in the apical ⅓. Fruit pedicel vestigial. Calyx glabrous; tube to 4 by 4 cm, turbinate, with prominent but unraised pale lenticels; calyx lobes vestigial.
An upper canopy tree, it is locally abundant and is mainly found on clay rich alluvium in fresh water swamps and on stream banks. In undisturbed mixed dipterocarp forests at elevations up to 400 metres.
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Locally abundant, fresh water swamps and stream banks, clay rich alluvium.
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