Trees small, or large shrubs. Branchlets at first white woolly, glabrescent. Buds glabrous. Stipules large, glandular dentate, dictyogenous, at first woolly; petiole ca. 2 cm, pilose; leaf blade ovate-lanceolate, elliptic-lanceolate, or elliptic, ca. 17 × 4.5 cm, abaxially at first white woolly, glabrescent, adaxially ± white tomentose, particularly along veins, base broadly cuneate to subcordate, margin glandular denticulate when young, later crenate or sinuolate-crenate, apex acuminate, acute, or obtuse; veins raised; lateral veins numerous, conspicuously dictyogenous. Catkins ca. 10 cm × 5 mm; peduncle 2-3 cm, with normal leaflets; rachis densely tomentose; bracts broadly ovate, broadly elliptic, or oblong, 1-1.5 mm, abaxially with filamentous hairs, apex glandular dentate or not. Male flower: adaxial gland ca. 1 mm, 2-parted, abaxial gland sublinear; stamens 2; filaments distinct, villous. Fruiting catkin ca. 1 cm thick. Female flower: adaxial gland linear-lanceolate, ca. 1.5 mm, sometimes 2-parted; ovary tomentose, sessile; style conspicuous, 2-cleft; stigma cleft. Capsule 4-5 mm, tomentose, sessile. Fl. Jun, fr. Jun-Jul.

* Streamsides, mountain slopes, woods; 2200-3000 m. S Gansu, W Sichuan, NW Yunnan.