Tree 6-20 m. Twigs 1.5-2 mm diameter, yellowish brown, early glabrescent, indumentum minute; older twigs sometimes faintly longitudinally cracking; lenticels few, small and inconspicuous. Leaves membranous or chartaceous, elliptic-oblong to oblong-lanceolate, 8.5-28 by 2.5-9 cm, base cuneate, apex subacute to acute-acuminate; upper surface (olivaceous-)brown, lower surface greyish brown with contrasting bright brown nerves, early glabrescent, hairs weak, scale-like, less than 0.1 mm; faintly papillose; dots absent; midrib above flat or slightly raised, lateral nerves (6-) 10-20 per side, at 45-70° to the midrib, slightly raised or sunken above, lines of interarching ± distinct, venation sometimes indistinct; petiole 10-22 by 1.5-3 mm; leaf bud 7-12 by 1.5-2 mm, hairs less than 0.1 mm. Inflorescences among the leaves or below, ± as in Knema\ in male: subsessile or with a peduncle to 15 mm, with at apex an usually bifurcate, scar-covered brachyblast to 5 mm, with 5-10 flowers in a subumbel, buds of various sizes; female inflorescences smaller than males, (sub)sessile, few-flowered; flowers late glabrescent, hairs sparse, grey-brown to dark brown, 0.1 mm. Male flowers: pedicel (2-)3-6 mm, bracteole 1.5-2 mm, (sub)persistent; buds ovoid-oblong, 4.5-7 by 3-4 mm, apex ± blunt or subacute, ± angled, base broadly rounded, cleft c. (1/3—)l/2, lobes membranous, (0.2-)0.3-0.4 mm thick, erect or reflexed at anthesis. Androecium 4-5.5 mm; androphore 1.5-2 by 0.6-1 mm, minutely pubescent (hairs 0.1 mm or less) in the lower 2/3; synandrium 2.5-3 by 0.6-1.2 mm, thecae 10-14, not tightly contiguous, sterile apex blunt, 0.3-0.5 mm. Female flowers: pedicel 2-3 mm, bracteole 2 mm, persistent; buds ovoid-oblong, (4-) 5-6.5 by 3-4 mm, narrowed and triangular in the upper 2/3, lobes reflexed at anthesis; ovary ovoid, hairs dense, 0.1 mm. Fruits 1 or 2 per infructescence, broadly ovoid, sub-globose, or ellipsoid, 3-5(-5.5) by 2.5-4.5 cm, hairs dense, rusty-brown, ± mealy, 0.1-0.2(-0.3) mm; pericarp 4-6(-10) mm thick; seeds broad-ellipsoid, 2.5-3.8 cm; fruiting pedicel 3-5 mm.
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