Tree 4-35(-40) m. Twigs terete or subterete, 2-5 mm diameter, never lined or ridged, early or late glabrescent, hairs rusty, mealy, 0.1-0.6 mm long; bark finely or coarsely striate, neither cracking nor flaking, lenticels distinct or not. Leaves thickly membranous to chartaceous, very brittle, (elliptic-)ovate-oblong to oblong-lanceolate, 7-28 by 2.5-9 cm, base ± rounded or usually attenuate, apex acute-acuminate; upper surface drying olivaceous or (greenish) brown, lower surface light brown or chocolate-brown, usually much contrasting with the upper surface, early glabrescent but midrib often late glabrescent; dots absent; midrib slender; nerves 6-15 (-20) pairs, distinctly raised above, lines of interarching usually not distinct; venation lax, faint; petiole 6-15 by 1.5-3 mm, sometimes late glabrescent; leaf bud 6-17 by 1.5-3 mm, with rusty dendroid hairs 0.1-0.6 mm long. Inflorescences with sparse to dense woolly hairs 0.6 mm long, sometimes glabrescent; in male: 3-5 times branched, many-flowered, 4-15(-20) by 3-12 cm, peduncle 0.3-1.5 cm long, the flowers in clusters of up to 8 each; in female: few-to many-flowered, up to 8 cm long; bracts oblong to lanceolate, 1.5-7 mm long, densely pubescent, caducous; flowers with perianth 3-lobed, glabrous or glabrescent, pedicel glabrous or minutely pubescent towards the base, articulated. Male flowers: pedicel slender, sometimes tapering, 0.8-1.5(-2) mm long; buds globose or broadly obovoid, 1-1.8 mm diameter, apex (broadly) rounded, base rounded or ± tapering into the pedicel, cleft 1/2-2/3, not collapsing on drying, lobes 0.2-0.4 mm thick, at base up to 0.6 mm thick; androecium (including androphore) ± broadly obovoid in outline, 0.5-0.8 by 0.6-1 mm, triangular in cross section (Plate 3: 72); thecae (6 or) 8-14, free for at least halfway, ± curved or suberect, 0.3-0.5 mm long, apex acutish, at base column short bowl-shaped, narrowed into ± tapering androphore, (0.2-)0.3-0.4 mm long. Female flowers: pedicel 1-1.8 mm long, minutely pubescent; buds broadly ellipsoid-obovoid, 2-3 by 1.8-2.8 mm, glabrous or with sparse hairs 0.1 mm, cleft 1/3-2/3; ovary ovoid-ellipsoid, 1.2-1.5 by 1-1.5 mm, glabrous, the stigma shallowly 2-lobed, 0.2-0.3 by 0.5 mm. Fruits 1-6 per infructescence, subglobose or ellipsoid, apex rounded, base rounded or slightly attenuate, 1.9-6 by 1.4-5 cm, glabrous, not lenticel-like tuberculate; pericarp 2-15 mm thick; fruiting pedicel 1-4 mm long; perianth not persistent.
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