Tree 15-35 m. Twigs 2-4(-7) mm diameter, early glabrescent, at first with scarce hairs 0.1 mm or less; bark striate, not flaking; lenticels ± inconspicuous. Leaves membranous or chartaceous, oblong-lanceolate, 8-30 by 2.5-10 cm, base attenuate, apex acute-acuminate, finely pale-pustulate on both surfaces; upper surface drying greenish to brown, lower surface bright brown, early glabrescent, hairs stellate-scaly, 0.1 mm long or less; dots absent; midrib flat above; nerves 12-20 pairs, flat and inconspicuous above, lines of interarching not distinct; venation thin, indistinct on both surfaces; petiole 10-18 by 1.5-3 mm, leaf bud 10 by 2 mm, with hairs 0.1 mm. Inflorescences with dense hairs 0.1-0.2 mm long, about 3 times branched; in male and female 4-8 by 3-4 cm, rather many-flowered, peduncle 1.5-2 cm; bracts broadly ovoid-ellipsoid, pubescent, 1.5-3 mm long, caducous; flowers in male in clusters of 2 or 3, perianth 2-lobed, glabrous; pedicel pubescent, not articulated. Male flowers: pedicel slender, 1-1.5 mm, with grey or pale brown hairs 0.1 mm; buds transversely ellipsoid, somewhat compressed laterally, 2-2.2 by 2.5-3 mm, drying brown, not collapsing on drying, cleft 2/3-4/5, lobes firm, 0.2-0.3 mm thick; androecium transversely ellipsoid to reniform, not much compressed, 1.5 by 2 mm (Plate 1:9); thecae c. 36, connate for basal half and forming a ± saucer-or cup-shaped column into which the free apical halves of the anthers are inflexed; androphore slender, 0.2-0.3 mm long. Female flowers not seen. Fruits 3-10 per infructescence, short-ellipsoid, 1.5-1.6 by 1.3-1.4 cm, glabrescent, at first with stellate hairs 0.1 mm or less (hence ovary pubescent), without conspicuous tubercles; pericarp 1.5 mm thick, fruiting pedicel 3-4 mm long; perianth not persistent.
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