Tree 7-20 m. Twigs 2-4(-5) mm diameter, with rusty hairs 0.3-0.6 mm, rather late glabrescent; bark blackish brown, finely striate, not flaking; lenticels small, inconspicuous. Leaves membranous, elliptic to oblong, 9-18 by 3.5-6.5 cm, base attenuate, apex acute-acuminate; upper surface drying dark brown or blackish brown, glabrous, lower surface glabrescent (except midrib); dots absent; midrib above raised, beneath with some vestigial indumentum or late glabrescent; nerves 9-13 pairs, raised above, lines of inter-arching on the lower surface irregular and not very conspicuous; venation lax, distinct or not; petiole 10-12 by 1.5-2 mm, glabrescent; leaf bud 8-12 by 2-3 mm, with rusty hairs 0.3-0.6 mm. Inflorescences with ± dense hairs 0.2-0.6 mm; in male: rather many-flowered, 3 (or 4) times branched, 6-14 by 3.5-9 cm, peduncle 1-2 cm long; in female (from infructescences): 3-4 cm long; bracts densely short-pubescent, ovate-elliptic, ± acute, 3 mm long, caducous; flowers (male) in clusters of 2-6 each, perianth 3-lobed, glabrous, pedicel glabrous or with a few minute hairs 0.1 mm at the very base, not articulated. Male flowers: pedicel 0.5-2 mm, slender; buds globose, 1.4-2(-2.2) mm diameter, cleft 1/3 to nearly 1/2, lobes 0.2 mm thick; synandrium depressed-globose, somewhat flattened or impressed at apex and/or base, in cross section rounded, (0.6-) 0.8-1 by (0.8—)1—1.3 mm, androphore slender, (0.3-)0.4-0.8 mm long (Plate 3: 78); thecae 14-22, almost completely connate, incurved, concealing the apical hollow, 0.2-0.3 mm deep. Female flowers not seen. Fruits 2-5 per infructescence, ellipsoid, 2.4-3 by 1.4-2 cm, apex subacute to rounded, base rounded or shortly narrowed, glabrous, drying dark brown, finely tuberculate, without lenticels, pericarp 1.5-2 mm thick; fruiting pedicel 2 mm long; perianth not persistent.
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