Tree 8-25 m. Twigs 2.5-4(-10) mm diameter, early glabrescent, hairs greyish brown, 0.1 mm; bark finely striate, not flaking; lenticels conspicuous or not. Leaves membranous to thinly chartaceous, (elliptic-)oblong, 14-27 by 5-10 cm, base attenuate, apex acute-acuminate; upper surface glabrous, drying olivaceous brown to blackish brown, the midrib glabrous but towards the base in younger leaves finely pubescent, lower surface glabrous; dots absent; midrib moderately raised above; nerves 13-18 pairs, raised above, lines of interarching not distinct; venation lax, barely visible on either surface; petiole 12-16 by 2.5-3.5 mm; leaf bud 12-17 by 2-3 mm, hairs dense, grey-brown to rusty, 0.1 mm long. Inflorescences behind the leaves, with sparse hairs 0.1 mm; in male: 2 or 3 times branched, few-flowered, 4-10 by 3-5 cm, peduncle 1-2 cm long, the flowers in loose clusters of 3-5; in female (from infructescences): 2-5 cm long; bracts not seen, caducous; flowers glabrous, perianth 3-or 4-lobed, pedicel not articulated. Male flowers: pedicel 1.5-2 mm long; buds subglobose to broadly ovoid, 2-2.5 by 2-2.3 mm, apex shortly rounded to subacute, not or only slightly collapsing on drying, cleft 1/2-2/3, lobes 0.4-0.5 mm thick, coriaceous; androecium subellipsoid, 1.5-1.6 by 0.8-0.9 mm, in cross section ± blunt-triangular (Plate 3: 88); thecae 10 or 12, at the base curved, and towards the apex erect or somewhat curved, 1.6 mm long, free apices 0.1-0.2(-0.3) mm, apical cavity narrow, 0.2-0.3(-0.5) mm deep, androphore narrow, 0.1-0.2 mm long, hidden by the anthers. Female flowers not seen. Fruits 1-5 per infructescence, ellipsoid, 4-4.2 by 2.5-3.2 cm, glabrous, drying rust-brown, finely granulate and with at most a few tubercles or lenticels; pericarp rather coriaceous, 3.5-8 mm thick; fruiting pedicel 2-4 mm long; perianth not persistent.
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