Large trees to c. 30 m high, upright to spreading, suckering slightly. Bark grey, strongly fissured. Shoots ± terete, except when young, yellowish grey. Buds viscid, glabrous. Young lvs not aromatic. Petiole of mature lvs to c. 9 cm long, compressed, except sometimes near base, glabrous or with scattered hairs. Lamina to 14 × 11 cm, but often < 10 × 6 cm, broad-deltoid or broad-ovate, glabrous except for margins, green on both sides; margin crenate-serrate, with very narrow translucent band, with curved glandular teeth, sparsely to moderately or occasionally strongly ciliate; base very broad-cuneate, or truncate to subcordate, rarely with glands; apex short- to long-acuminate. Catkins ♂, pendulous, to c. 15 cm long. Rachis glabrous. Bracts 2-4 mm long excluding long subulate teeth, glabrous, brown. Cup-shaped disc usually 1-1.5 mm deep, ± oblique, glabrous. Stamens (15)-20-40; anthers crimson.