Tree up to 35 m tall, base of trunk fluted, evergreen. Leafy twigs 3-6 mm thick, minutely whitish appressedly puberulous, smooth, drying blackish; lenticels scattered, few. Leaves spirally arranged; lamina coriaceous, entire, elliptic, 18-23 by 4-19 cm, apex rounded to obtuse, base rounded to obtuse (to subcordate), often slightly unequally, margin entire, ± revolute; both upper and lower surface (sub)glabrous and smooth; lateral veins 7-10 pairs, some of them branched or forked away from the margin, tertiary venation scalariform, flat; petiole 1-3.5 cm long, 2-3 mm thick, (sub)glabrous, the epidermis persistent; stipules fully amplexicaul, 1-4 cm long, minutely brownish to whitish appressedly puberulous, caducous. Staminate inflorescences axillary, solitary; peduncle 1.2-3.5 cm long, sparsely minutely whitish puberulous and also with brown uncinate hairs; head ovoid to conical, up to 2.5 by 1 cm; perianth tubular, c. 0.7 mm long, the apex 2-lobed, minutely puberulous; stamens immature; interfloral bracts absent. Pistillate inflorescences axillary, solitary; peduncle 3-7.5 cm long, minutely whitish puberulous and also with brown uncinate hairs; head ellipsoid; perianth tubular, brownish hispidulous, the apex convex; stigma bifid; flowers intermixed with interfloral processes. Infructescences ellipsoid, up to 8 by 6 cm, covered with 2-3 mm long, pyramidate apices of the perianths, intermixed with 6-10 mm long spine-like, slightly curved processes; fruits ellipsoid to subglobose, c. 1.5 cm long.
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