Small or medium-sized tree. Twig, bud, stipule outside, petiole and nervation beneath densely persistently yellow-brown scabrid tomentose; stipule inside and midrib above densely evenly, nerves above sparsely evenly yellow-brown pubescent. Twig 2-4 mm ø apically, terete, becoming smooth; stipule scars short, dark, horizontal or descending. Bud 6 by 3 mm, ovoid, subacute. Stipule to 16 by 5 mm, lanceolate, subacute, subpersistent. Leaves 6-17 by 2.5-8 cm, of variable size, narrowly ovate, coriaceous; base cordate, sub-equal; acumen to 1.5 cm long, slender; nerves 13-17 pairs, prominent beneath, at 110° towards the base, 35° towards the apex; tertiary nerves scalariform, prominent beneath, set at c. 90° to the nerves; midrib beneath prominent; midrib and nervation frequently somewhat depressed and the lamina bullate above; petiole 5-6 mm long, very short. Panicles to 10 cm long, terminal or axillary, terete, persistently fulvous to yellow-brown scabrid pubescent; singly branched, branchlets short, the flowers congested. Flower bud to 14 by 4 mm, lanceolate. Sepals pubescent on parts exposed in bud; outer 3 deltoid, acute; inner 2 smaller than outer 3, narrowly ovate, with thinner margin. Petals dark red within, paler outside (Borneo) or white throughout (Malaya), lanceolate, densely pubescent on parts exposed in bud. Stamens 15, in 3 unequal verticils; filaments compressed, tapering to the small subglobose anthers; appendage to connective slender, about as long as anther, becoming reflexed at anthesis. Ovary ovoid, shortly pubescent; style filiform, glabrous, about twice as long as ovary. Fruit subsessile. Calyx sparsely yellow-brown pubescent; lobes to 2.5 by 2 cm, subequal, ovate, acute, saccate towards the base. Nut to 5.5 by 2.5 cm, ellipsoid, acute, pale yellow-brown pubescent.
Can be grown by seedlings. Seeds needs soaking.
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