Tree 15-20 m. Twigs 1-1.5 mm diameter, (yellow-)brown, early glabrescent, hairs scattered, less than 0.1 mm; older twigs brown, coarsely striate or faintly longitudinally cracking; lenticels inconspicuous or absent. Leaves thinly membranous, (oblong-)lanceo-late, 7-14 by 2-4 cm, base cuneate, apex acute-acuminate; upper surface olivaceous or (dark) brown, lower surface slightly paler, greyish brown, early glabrescent, hairs scattered, pale grey-brown, stellate, less than 0.1 mm; not papillose; dots absent; midrib ± flat or slightly raised above, lateral nerves 12-16 per side, at 60-80° to the midrib, flat or sunken above, slender and little conspicuous below, lines of interarching and venation indistinct; petiole 10-20 by 1(—1.5) mm; leaf bud 10 by 1-1.5 mm, hairs 0.1 mm or less. Male inflorescences 2 or 3 times as long as the petioles, 4 cm, with slender peduncle, 10 by 1 mm, higher up once or twice forked, and with few flowers at the ends of short branches, 2 mm long. Male flowers: pedicel slender, 8 by 0.3 mm, bracteole persistent, 0.5 mm; buds urceolate, 3 mm, at the base 2 mm wide. Androecium 2.3 mm; androphore 1 mm, subpuberulous; synandrium 1.2-1.3 mm, sterile apex obtuse, thecae c. 10. Female inflorescences and flowers not seen. Infructescences in the apical part of the twigs, among the leaves, peduncle slender, 10-25 by 1.5 mm, with or without a branch up to 10 mm, with a few scars of fallen flowers, glabrous (early glabrescent). Fruits solitary, ovoid-ellipsoid, 3.5-4(-4.5) by 2-2.7 cm, apex rounded, base broadly rounded, glabrous (when immature with pale rusty scurf of scale-like hairs less than 0.1 mm, soon glabrescent), rusty brown; pericarp 3-4 mm thick; seeds ellipsoid, 2-2.5 cm; fruiting pedicel 5-10 mm, bracteole scar subapical.
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