Tree 10-20 m. Twigs 3.5-6(-10) mm diameter, early to rather late glabrescent, hairs 0.3—1(—1.5) mm long; bark coarsely striate, not flaking, lenticels small, not contrasting in colour and inconspicuous. Leaves membranous to chartaceous, elliptic-oblong to oblong-lanceolate, 15-35 by 5-11 cm, base short-attenuate to narrowly rounded, apex acute-acuminate; upper surface glabrescent, except towards the base of the midrib in young leaves, olivaceous to brown, lower surface glabrous (glabrescent), without dots or hair scars, sometimes pale and contrasting with upper surface; midrib slender, ± raised above, nerves 11 or 12 pairs, above flattish or raised, lines of interarching not distinct; venation lax, ± distinct or not; petiole 8-15 by 2.5-3.5 mm, glabrescent; leaf bud 15-22 by 3-4 mm, with dense rusty hairs 0.5—1(—1.5) mm long. Inflorescences behind the leaves, with shaggy rusty hairs 0.5 mm; in male: 3 or 4 times branched, many-flowered, 10-21 by 10-16 cm, peduncle 1.5-4 cm long, in male in loose clusters of 5-10; in female (in fruit): 7-8 cm long; bracts broadly ovate-ellipsoid, 2-7 mm long, finely pubescent, caducous; flowers glabrous, perianth 3-(or 4-)lobed, pedicel sometimes ± articulated (see note 2). Male flowers: pedicel 0.8-1.5(-2) mm long, buds (depressed-)globose, 1.5-2 by 2-2.3 mm, apex and base (broadly) rounded, glabrous, cleft 1/2-2/3, lobes 0.2 mm thick, not or only slightly collapsing on drying; androecium depressed-globose, 0.6-1 by 1.1-1.8 mm, apex broadly rounded, base rounded or sagged (Plate 3: 79); thecae 20-26, almost completely sessile, 0.8-1.2 mm long, free apices up to 0.1 mm, incurved, concealing a ± 3-radiate apical slit or cavity 0.2-0.5 mm deep; column broad, solid; androphore rather narrow, (0.1-)0.2-0.4 mm long, completely or partly hidden by the anthers. Female flowers (from fruit): 3-lobed, 3 mm long. Fruits 1-3 per infructescence, ellipsoid, apex and base rounded, 7-8 by 4.5-5 cm, glabrous, drying dark brown, finely to coarsely tubercled, pericarp 15 mm thick; fruiting pedicel 3 mm long; perianth persistent.
Home