Tree 3-30(-45) m. Twigs faintly angular, ± ridged or lined when young, 1—2(—3.5) mm diameter, with hairs 0.1 mm, early glabrescent, bark chocolate or grey, later on grey-brown, smooth, lenticellate. Leaves thinly chartaceous to coriaceous, elliptic to lanceolate, 5-17 by 1.5—5.5(—6) cm, in E Malesia up to 27 by 8.5 cm, apex acute(-acuminate), base attenuate, margin conspicuously revolute or not, olivaceous or brown, sometimes glossy above; lower surface with sparse appressed hairs 0.1 mm, glabrescent, pale brown to grey-purplish; midrib above flat or sunken (grooved), to 1 mm wide; nerves 7-11 (-15) pairs, flat or raised below, discolorous or not; venation indistinct; petiole 6-15 (-18) by 1-2.5 mm; leaf buds slender, 5-10 by 1-2 mm, with dense appressed greyish hairs 0.1 mm. Inflorescences paniculate, with rusty hairs 0.2 mm long; in male 2.5-12 cm long, up to 8 cm wide, many-flowered, in female up to 4 by 2 cm, fewer flowered; bracts broadly triangular, 1 by 2 mm, pubescent, caducous. Flowers rusty pubescent inside and outside, hairs 0.1 mm long. Male flowers: pedicel 1.5-4 mm long; buds ellipsoid (-oblong), 2.5-4 by 2-3 mm, cleft 1/3-2/3, lobes 3 or 4, (long-)triangular, slightly spreading, tube 1-2.3 mm long; androecium truncately ellipsoid-oblong, 1-2.5 by 0.8-1 mm, stiped up to 0.3 mm; anthers (6 or) 7—11(—13), subsessile, free apices up to 0.5 mm long, erect or somewhat incurved. Female flowers: pedicel 1.5-3 mm long, buds ovoid or obpyriform, 2-3 by 1.5-2 mm, cleft 1/2-3/4, lobes 3 or 4, long-triangular, strongly spreading or recurved, tube short-urceolate, 0.7-1.5 mm long; ovary subglobose, 1 mm diameter, densely minutely pubescent, stigma minute, subsessile. Fruits up to 13 per infructescence, subglobose to ellipsoid-oblong, 1.8-2.8 by 1.1-1.9 cm, glabrescent (glabrous) or inconspicuously pubescent, hairs 0.1 mm long; pericarp 1 mm thick; fruiting pedicel 4-15 mm long.
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A tree. It grows 37 m tall. The trunk can be 45 cm across. The stem has red sap. The leaves are simple and alternate. They are white underneath. The flowers are yellow to orange and 3 mm across. They are in small groups. The fruit are 18 mm long and orange-red. They are capsules that split open.
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