Description from Flora of China
Trees to 20 m tall; bark dark gray or gray-brown. Branchlets purple-brown, glabrescent. Petiole glabrous, ca. 1.5 cm; leaf blade ovate-lanceolate or elliptic-lanceolate, 6-27 × 2.5-8 cm, both surfaces glabrous except sparsely villous along midvein and lateral veins, bearded in axils of lateral veins, base cordate, subrounded, or broadly cuneate, margin irregularly and doubly setiform serrate, apex acuminate; lateral veins 24-34 on each side of midvein. Female inflorescence 45-50 × 3-4 cm; peduncle 3-5 cm, densely pubescent and sparsely villous; bracts densely overlapping, obliquely elliptic, 1.8-2.5 × 1-1.2 cm, papery, both surfaces sparsely villous along veins, abaxially bearded at base, outer margin remotely serrate and slightly inflexed, inner margin remotely minutely serrate proximally, with small, inflexed basal lobe covering nutlet, apex acute; veins 5 from base, reticulate veins faint. Nutlet oblong, ca. 3.5 mm, glabrous, faintly ribbed. Fl. May-Jun, fr. Jul-Sep.
* Forests in mountain valleys and on shaded slopes; 900-2000 m. N Guangxi, Guizhou, Sichuan, E Yunnan