Tree 10-20 m. Twigs somewhat flattened but not angular, 2-5 mm diameter, glabrescent, hairs 0.1 mm; bark finely striate, not flaking; lenticels abundant, small, not conspicuous. Leaves membranous, (oblong-)lanceolate, 8-23 by 2.5-7.5 cm, base attenuate, apex acute-acuminate; upper surface drying olivaceous or brown, dull (sometimes with fine pale pustules or larger irregularly shaped marks), lower surface early glabrescent; dots absent; midrib flat above; nerves 10-15 pairs, flat, inconspicuous above, lines of interarching indistinct; venation fine, indistinct; petiole 6-16 by 1.5-2.5 mm; leaf bud 6-13 by 1-2 mm, with hairs 0.1 mm long. Inflorescences with sparse or dense hairs 0.1-0.3 mm; in both male and female: 3 or 4 times branched, many-flowered, 4-10 by 4-8 cm, peduncle 1-2 cm long; bracts pubescent, elliptic to oblong, 2-5 mm long, caducous; flowers in loose clusters of 2-4, perianth 2-lobed, glabrous or in female sometimes minutely pubescent at base, pedicel with sparse hairs 0.1 mm long or less, not articulated. Male flowers: pedicel slender, 1-2 mm long; buds somewhat laterally compressed, obtriangular to transversely ellipsoid, 2.2-3 by 2.5-4 mm, apex broadly rounded, at base short-attenuate, firm, not collapsing on drying, bright brown or with a grey-blue tinge, cleft c. 1/2, lobes (0.1-)0.2-0.3 mm thick; androecium transversely ellipsoid or ± obtriangular, not or slightly laterally compressed, largely hollow, (1-) 1.6-2.2 by 1.6-3 mm (Plate 1: 6); thecae 36-50, completely connate, forming a thin-walled cup, the anthers (sometimes only on one side of the androecium) completely inflexed from the middle and reaching nearly the bottom of the cup, free apices 0.1 mm; androphore narrow, 0.1-0.3 mm long. Female flowers: pedicel 1-2 mm, with sparse hairs 0.1 mm; buds ellipsoid, (2.5-)3-3.5 by 2.5 mm, cleft c. 1/3; ovary ovoid-ellipsoid, 2-2.3 by 1.5 mm, glabrous, style and stigma 2-(or 3-)lobed, 0.1-0.2 mm long. Fruits 2-10 per infructescence, ellipsoid to nearly globose, l.l-1.6(-2) by 1-1.3 cm, glabrous, finely granulate, not or hardly tuberculate; pericarp 1-1.5 mm thick; fruiting pedicel 2-4 mm long; perianth not persistent.
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