Tree 10-30 m. Twigs l-2.5(-5) mm diameter, sometimes faintly lined, with hairs 0.1 mm or less, glabrescent; bark finely striate, not flaking; lenticels small, inconspicuous. Leaves (thinly) chartaceous, oblong or oblong-lanceolate, 5-16 by 1.5-3.5(-4.5) cm, base (long-)cuneate, apex acute-acuminate; upper surface drying olivaceous-brown, sometimes with small whitish marks, lower surface early or late glabrescent, hairs 0.1 mm or less; with or without dots of mixed size; midrib slightly raised above; nerves 9-17 pairs, flat, inconspicuous above, lines of interarching ± regular, indistinct; venation lax, inconspicuous; petiole 10-20 by 1-1.5 mm; leaf bud 10-20 by 1.5-2 mm, with hairs 0.1 mm. Inflorescences with sparse hairs 0.1-0.2 mm long; in male: 2 or 3 times branched, not many-flowered, 5 by 3.5 cm, peduncle 1 cm long, flowers solitary or 2 or 3 together; in female: 1-3 cm long, little branched, 4-10-flowered; flowers with sparse hairs 0.1-0.2 mm or less, perianth 2-lobed; pedicel not articulated. Male flowers: pedicel 1.5-2 mm long, tapered; buds obovoid to pear-shaped, somewhat laterally compressed, drying blackish, not or little collapsing on drying, 2.5-3 by 2-2.3 mm, apex broadly rounded, base tapering into the pedicel, cleft c. 1/6, lobes (at the base) 0.4-0.5 mm thick; androecium (synandrium) long-obovoid, laterally flattened, 1.5-1.8 by 1-1.2 mm, subtruncate (Plate 1: 31); thecae 12-16, erect, free apices 0.3-0.4 mm; column solid, except for the apical part between the free apices of the anthers; androphore slender, 0.6-0.8 mm long. Female flowers: pedicel 1-2 or 3-4 mm long; buds subglobose to obovoid, variable in size, 2-3 by (1.8-)2-3.5 mm, cleft 1/4-1/6; ovary ovoid, 1.4-2.2 by 1-2 mm, densely minutely pubescent; style and stigma(s) minute, 0.1 mm. Fruits 1-4 per infructescence, ellipsoid (and ± contracted at base) or pear-shaped, 2.5-3.5 by 1.8-2.4 cm, glabrescent, granulate or with small lenticels or tubercles, drying brown; pericarp thick-woody, 4-8 mm thick; seeds broadly ellipsoid, 17 by 14 mm; fruiting pedicel 3-10 mm long; perianth not persistent.
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