Tree, up to 50 m, 1.20 m dbh. Axillary buds 2(-4), c. 2 mm long. Petiole 3-8 mm. Leaf-blade (2.5—)4—13 by (1—)2—7 cm; above mostly greyish brown to dark brown, sometimes reddish brown, midrib slightly sunken, nerves mostly obscure; beneath concolorous, sometimes more or less waxy, secondary nerves 5 or 6 pairs, not forming an intra-marginal nerve, finely prominent to rather obscure; glands few, 0-2(-4) per leaf, near the base and in the middle, 0.1-0.2 mm diam. Pedicel c. 8-12 mm, dark, minutely lanate. Sepals densely minutely hairy inside at base, further almost glabrous; outer sepals 1.8-3 by 1.8-2 mm; inner sepals 3-3.5 by 2-2.5 mm. Petals 7-7.5(-8) mm long, dark reddish when dry, glabrous outside, hairy inside at base and sometimes also in apical part. Stamens: filaments 11-13 mm, shortly rather densely lanate, glabrous in apical part, free or (in var. glabrum) forming a 'tube' by their intertwined hairs; anthers c. 0.8 mm long, glabrous. Disk glabrous. Ovary densely lanate or rarely (sub)glabrous; style glabrous in upper half; ovules 8-12. Fruit c. 2-6 cm diam., often apparently sterile, shortly to long-stipitate, black, often waxy, glabrous or hairy; pericarp 0.5-1.5 cm thick; pedicel up to c. 1.5 mm. Seeds c. 4-12.
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A tree. It grows about 30 m tall. The leaves are alternate and simple. The flowers are 15 mm across. They are red. The fruit are about 4 cm across. They are green to yellow-brown.
Undisturbed mixed dipterocarp, (peat)-swamp and sub-montane forests up to 1,000 metres. Mostly on hillsides, but also on ridges and alluvial sites. On clay to sandy soils. In secondary forests usually present as a pre-disturbance remnant.
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A tropical plant. It grows in mixed and swamp forest up to 1,000 m above sea level.