Herbs perennial, dioecious, 60-80 cm tall. Stems ascending or erect, simple, glabrous or strigose. Leaves alternate; nanophylls absent; stipules lanceolate-oblong, 14-16 × 2-3 mm, glabrous, with cystoliths; petiole 0-1.5 mm; leaf blade obliquely oblong-obovate, 15-19 × 4-6.5 cm, papery, major basal lateral veins both arising at base of leaf blade, abaxial surface sparsely puberulent along veins, adaxial surface glabrous, cystoliths conspicuous, dense; base with broader half auriculate (auricle ca. 8 mm), margin densely dentate, apex acuminate or caudate. Male inflorescences in pairs, simple, 10-13 mm in diam.; peduncle 2-3.5 mm; receptacle ca. 6.5 mm; bracts obscure; bracteoles cymbiform-lanceolate. Female inflorescences in pairs, 8-12 × 5-9 mm; peduncle 6-10 mm; receptacle oblong, 7-10 × 4-8 mm; bracts nearly absent; bracteoles linear. Male flowers 5-merous. Achenes ovoid, 8-ribbed. Fl. May-Aug.

* Evergreen broad-leaved forests in mountains, forest margins or streamsides in valleys; 800-2200 m. SE Xizang, NW Yunnan.