Trees ca. 20 m tall (to 50 m in Indonesia and Malaysia); young branches glabrous or sparsely pubescent, older growth lenticellate. Stipules 2–6 mm; petiole slender, 2–4 cm, sparsely pubescent; leaf blade ovate or narrowly ovate, 8–14 × 4–7 cm, abaxially glabrescent, base rounded or subcordate, margin crenate-serrate, apex acuminate; lateral veins 6–8 on each side. Male inflorescences globose, many, arranged in raceme. Female inflorescence usually solitary in leaf axils, 14–22-flowered; peduncle 2–4 cm, pubescent. Male flowers: stamen filaments ca. 1 mm, glabrous; anthers somewhat longer than filaments. Female flowers: staminode teeth absent; styles 3–4 mm, pubescent. Infructescences subglobose, 1.5–2 cm wide. Capsules without staminode teeth. Seeds many, brown. Fl. Mar–May, fr. Jun–Aug.