Tree 5-30 m. Twigs (1-) 1.5-3.5 mm in diameter, at first with grey or brown hairs 0.1 mm long or less, early glabrescent; bark coarsely striate, not tending to crack or flake. Leaves membranous or chartaceous, elliptic to lanceolate, 6-20(-25) by 2-5.5(-l 1) cm, apex obtuse or (acute-)acuminate, base ± rounded to attenuate, greenish to (blackish) brown, dull or glossy above; lower surface grey or pale brown, at first with scattered, very weak, greyish (or pale brown) hairs 0.1 mm long or less, early glabrescent; dots absent; midrib little raised above; nerves 12-22(-25) pairs, raised to flat above; venation coarse (aréoles 0.5 mm in diameter or more), distinct above; petiole 7-20 by 1-3 mm. Inflorescences: sessile or (in E Java and Borneo) with peduncle up to 3 mm, brachy-blast simple or 2-or 3-fid, up to 15 mm long; in male (2-)5-20-flowered, in female 1-8-flowered; flowers with persistent greyish brown scale-like hairs 0.1 mm long or less, perianth 3-(or 4-)lobed, red or in Java and Bali also yellowish (?). Male flowers: pedicel 4-10 mm long, bracteole 0.5-1 mm, persistent, median or above; buds subglobose, 2.5-3.5 mm in diameter, cleft c. 4/5, lobes 0.5-0.8 mm thick; the staminal disc flat to faintly convex, sometimes finely papillate, circular, 1.5-2(-2.5) mm in diameter; anthers 8-10, or in Borneo, E Java, and Bali frequently 11-15, subsessile to stiped, spaced, 0.3-0.5 mm long, ± horizontal, the connective broad or narrow above, the thecae opening nearly laterally; androphore 0.5-1 mm long. Female flowers: pedicel 1-6 mm long, bracteole somewhat above median; buds ovoid-ellipsoid or obovoid-oblong, 4-6 mm long, cleft to about halfway, lobes at sutures 0.8-1.5 mm thick; ovary ovoid, 1.5-2.5 by 1-2 mm; style 0-0.5 mm long, stigma ± flat to erect, 2-lobed and each lobe again 2-4-lobulate. Fruits 1-4 per infructescence, subglobose to ovoid or ellipsoid, 1.8—3(—4?) by 1.4-1.8(-2.5?) cm, at first with short scale-like hairs 0.1 mm long or less, early glabrescent, leaving a fine-granulate surface; dry pericarp 1.5-2.5 mm thick; fruiting pedicel 3-12 mm long.
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A tree. It grows 21 m tall. The stem has red sap. The leaves are alternate and simple. They are whitish underneath. The flowers are reddish and 4 mm across. They occur in groups. The fruit are about 2.5 cm across. They are yellow to red, They are capsules. The seeds have a yellow to orange fleshy layer or aril around them.
Primary and degraded evergreen forest, including mixed dipterocarp; forest edges, riverine forest, periodically inundated forest, pole forest, thickets; on a great variety of soils; at elevations up to 1,500 metres.
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It is a tropical plant. It grows in mixed forest and swamp forests. It grows up to 300 m altitude. It occurs along rivers and in swamps. It grows on clay and sandy soils.
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