Tree 5-9 m. Twigs subterete or 2-angled, with lines or wings to 1 mm high joining the bases of the petioles, (4-)5-7 mm diameter, early glabrescent, hairs to 0.1 mm, hollow and faintly swollen, in places with slit-like perforation, inhabited by ants; older twigs not flaking, with small conspicuous lenticels. Leaves membranous, oblong, 20-35 by 7.5-14 cm, base (short-)cuneate, rounded, or shallowly cordate, apex acute-acuminate; upper surface olivaceous, lower surface greyish; papillose or not (see note); dots absent; midrib slightly raised towards the apex, lateral nerves 17-30 per side, at 60-80° to the midrib, flat or impressed above, lines of interarching and venation distinct; petiole 15-25 by 2-3 mm; leaf bud 10-15 by 2-3 mm, hairs scale-like, 0.1 mm. Inflorescences between the leaves or below, of the Knema-typt, (sub)sessile, scar-covered brachyblasts, simple or forked, to 7 by 4 mm, finely brown pubescent; bracts small, caducous; in male with subumbels of 8-15 flowers, buds about equal in size; female inflorescences with 6-10 flowers, buds equal in size, sometimes present together with fruits of previous season; flowers with dense or sparse brown hairs 0.1 mm or less, sometimes glabrescent. Male flowers (immature): pedicel 10-11 by 1(—1.5) mm, bracteole sometimes ± 3-topped, 3.5 mm, subpersistent; buds ellipsoid(-oblong), 4.5 by 3 mm, cleft 1/4-1/3, lobes 1 (-1.5) mm long, 0.3(-0.4) mm thick. Androecium 3 mm; androphore 0.3 by 0.5 mm, hairs scattered, pale, less than 0.1 mm long; synandrium 2.5-2.8 by 1 mm, apex rounded, thecae 16-20, sterile apex absent. Female flowers: pedicel 7-9 mm, bracteole caducous; buds ovoid-oblong, ± tapering towards apex, 6-8(-9) by 3-5 (-6) mm, lobes 2-3 mm; ovary ovoid-oblong, 4.5-6 by 2-3 mm, hairs scale-like, less than 0.1 mm. Fruits in fascicles of (2-)4-7, ovoid-oblong, 3-3.5 by 1(—1.5) cm, narrowed from the middle into a narrow beak 2-3 mm (stigma remnant), base rounded, hairs dense, (red-)brown, scalelike, less than 0.1 mm; pericarp 1 mm thick; seeds ellipsoid-oblong, 2 cm; fruiting pedicel slender, 12-15 by 1(—1.5) mm, with few conspicuous wart-like mealy lenticels towards the apex.
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