Tree 10-30 m. Twigs 2.5-4(-5) mm diameter, yellowish or reddish brown, early glabrescent, hairs grey, 0.1 mm or less; older twigs sometimes ± fissured or flaking, sometimes with few lenticels. Leaves chartaceous or subcoriaceous, elliptic-oblong, 12-30 by 5-11 cm, base ± cuneate or (narrowly) rounded, apex acute-acuminate; upper surface olivaceous or brown, lower surface almost concolorous, glabrous; not papillose; dots absent; midrib flat or somewhat raised above, lateral nerves 17-25 per side, at 45-80° to the midrib, flat, faint above, faint and little raised below, lines of interarching and venation indistinct; petiole 15-25 by 2.5-4 mm; leaf bud 15-20 by 3-4 mm, hairs less than 0.1 mm. Inflorescence between the leaves or below, pedunculate, glabrescent, indumentum minute; bracts small, caducous; in male: 3-5 by 2-3.5 cm, peduncle flattened, 10-23 by 2-4 mm, ending in a single (somewhat adaxial) flower and with (1) 2 (or 3) branches, (1—)2—5(—15) mm, ± flattened (occasionally the middle branch once more forked), with to 10 mm long scar-covered brachyblasts with subumbels of (5-) 10-15 flowers; buds of almost equal sizes; female like male, but much reduced, peduncle 10-15 mm, generally 3-flowered; flowers ± coriaceous, appearing as if glabrous, but hairs widely spaced, 0.1 mm or less, or glabrescent. Male flowers: pedicel ± flattened, 5-8 by 1.5 mm, bracteole 2 mm, persistent, (sub)apical; buds ovate-ellipsoid, 7-8.5 by (3-)4-5 mm, base ± attenuate or rounded, ± narrowed to the subacute apex, angled, cleft 2/3-3/4, lobes (4-)5-6 mm long, 0.3(-0.5) mm thick. Androecium slender, 5-6.5 mm; androphore 1-1.5 by 0.8 mm, in the lower half with brownish hairs, 0.2 mm; synandrium sometimes blunt triangular, 4-5 by 1 mm, thecae 14-20, sterile apex absent or irregularly shaped, to 0.2 mm. Female flowers: pedicel 6-8 by 2 mm, bracteole subapical; buds ovoid-oblong, narrowed to the apex, angled, 8-9 by (4-)5 mm, lobes 4 mm; ovary ovoid, 4 by (3-)3.5 mm, hairs 0.2-0.3 mm. Fruits 1-3 per infructescence, (ovoid-)oblong, 4.5-5.5(-6) by (2.5-)3 cm, apex narrowly rounded with stigma remnant, base rounded or ± attenuate, hairs brown powdery, 0.5 mm long, partly glabrescent; pericarp 3 mm thick; seeds ellipsoid-oblong, 3-3.5 cm; fruiting pedicel 10-17 by 3 mm, glabrous, bracteole scar 3-4(-10) mm below the apex.
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