Trees to 17 m tall; bark brown-gray. Branchlets dark brown, sparsely villous or glabrescent. Petiole 4-15 mm, sparsely pubescent or subglabrous; leaf blade oblong, oblong-lanceolate, ovate-lanceolate, or ovate-elliptic, rarely ovate or elliptic, 5-10 × 2-3.5 cm, abaxially sparsely villous along veins, bearded in axils of lateral veins, adaxially glabrous, base subrounded-cuneate, subrounded, or subcordate, sometimes unequal, margin regularly and doubly minutely serrate, apex acuminate, rarely acute; lateral veins 12-14 on each side of midvein. Female inflorescence 5-7 × 1-2.5 cm; peduncle 2-3 cm, sparsely villous or glabrous; bracts semiovate, rarely broadly semiovate, 1-2.5 cm, sparsely villous along veins, outer margin irregularly dentate, without basal lobe, inner margin entire, straight, or subfalcate, with inflexed basal auricle, apex obtuse or acute; veins 5, reticulate veins prominent. Nutlet broadly ovoid, 3-4 × 2-3 mm, densely pubescent, rarely glabrescent, villous at apex, sparsely resinous glandular, prominently ribbed. Fl. May-Jun, fr. Jul-Sep.