Tree 7-35 m. Twigs 2-4 mm diameter, ± angular, early glabrescent, hairs less than 0.1 mm; older twigs often blackish, longitudinally cracking and moderately flaking; lenticels absent. Leaves thinly chartaceous, (elliptic-)oblong, sometimes contracted below the middle, 10-30 by 4-10 cm, base rounded or cuneate, apex acute-acuminate; upper surface olivaceous-brown, lower surface greyish brown, early glabrescent; papillation either not obvious or distinct (subsp. papillosa)', dots absent; midrib raised above, lateral nerves 14-20 per side, at 60-80° to the midrib, flat or sunken above, contrasting below, lines of interarching and venation distinct; petiole 12-24 by 2-3 mm, leaf bud 7-12 by 1.5-3 mm, hairs 0.1 mm or less. Inflorescences between the leaves or below, early glabrescent, hairs less than 0.1 mm; in male: narrowly paniculate, many-flowered, 7-10 by 3-4 cm, peduncle 20-30 mm, basal branches 10-20 mm, ± branched, central axis with up to 13 side branches 10 mm long or less, subumbels of 5-15 flowers, buds of various sizes; bracts 2-3 mm, caducous; female inflorescences smaller than male, 1.5-2.5 cm long; flowers early glabrescent, hairs 0.1 mm or less. Male flowers: pedicel 3-5 mm, bracteole 1.5 mm, subcircular, glabrescent, margin ciliate, caducous or persistent; buds (subglobose-)ovoid, 3-3.5 by 2-3(-3.5) mm, cleft 1/4-1/3, lobes 0.3 mm thick. Androecium 1.5(-2) by 0.8(-l) mm, consisting almost entirely of the synandrium; androphore 0.2-0.5 mm long, glabrous; thecae 12-16, anthers 1.5 mm long, with free apices 0.1-0.2 mm, sterile apex absent or apex of synandrium shallowly hollowed. Female flowers: pedicel 2 mm long, bracteole (1-)1.5 mm, margin ciliate, persistent; buds broadly ellipsoid, 2-2.5 by 1.5 mm, cleft 1/4-1/3; ovary conical-ovoid, 1.3 by 1 mm, almost glabrous. Infructescence 1-2 cm long, with few flower scars, 1-or 2-fruited. Fruits ellipsoid-oblong, 4-6 by 2.5-4 cm, glabrous, but with minute indumentum in grooves near the fruiting pedicel; pericarp 5-10 mm thick; seeds 3.5-4.5 cm; fruiting pedicel 5-8 mm long.
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