Tree 10-15 m. Twigs 3-5(-7) mm diameter, early glabrescent, with greyish to rusty hairs 0.1 mm long or less; bark bright brown to yellowish, coarsely striate with a tendency to cracking longitudinally, or flaking; lenticels ± smal, conspicuous or not. Leaves membranous to thinly chartaceous, elliptic-oblong to lanceolate, 14-32 by 4-8.5 cm, base attenuate, apex acute-acuminate; above drying dull with a finely wrinkled or granulate structure, olivaceous-brown, lower surface glabrous, almost concolorous; dots absent; midrib flat or slightly raised, glabrous above; nerves 11-17 pairs, sunken, flat, or slightly raised above, lines of interarching ± invisible; venation ± lax, ± invisible; petiole 6-12 by 2-5 mm; leaf bud 10-15 by 1.5-2.5 mm, with dense greyish to dull-brown hairs up to 0.1 mm long. Inflorescences glabrous or with few scattered hairs up to 0.1 mm; in male: about 3 times branched, rather many-flowered, 5-12 by 3.5-7 cm, peduncle 0.7-2.5 cm long; in female (in fruit): 2-3 cm long, once or twice branched; bracts not seen, caducous; flowers in male in loose clusters of 2-5, glabrous, perianth 3-(or 4-)lobed, pedicel not articulated. Male flowers: pedicel 1.5-5 mm long, slender, well marked off from the perianth; buds obovoid to broadly ellipsoid, 2.8-3.7 by 2-3 mm, base rounded to short-tapering, cleft 1/5-1/4 (to nearly 1/3), lobes 0.2-0.4 mm thick, androecium obovoid-ellipsoid, apex broadly rounded or ± depressed, in cross section subcircular or bluntly 3-or 4-angular, 2-2.7 by 1.5-2 mm (Plate 2: 46); thecae 24-40, mutually appressed, almost completely sessile with free apices 0.1 (-0.2) mm long, column broad and solid with a broad apical hollow, 0.5-0.8 mm deep, concealed by the overcurved anthers; androphore narrow, 0.2-0.3 mm long, largely hidden by the anther bases. Female flowers not seen. Fruits 4-8 per infructescence, ellipsoid, apex subacute, 1.5 by 1.2 cm, glabrous, drying blackish, without lenticels or tubercles; pericarp 1.5 mm thick; fruiting pedicel 1-2 mm long; perianth not persistent.
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