Herbs perennial, monoecious, 30-40 cm tall. Stems ascending or erect, usually simple, pubescent. Leaves alternate; nanophylls absent; stipules linear, 4-6 × 1.5-2 mm, glabrous, without cystoliths; petiole absent; leaf blade obliquely oblong-obovate or oblong, 6.5-11 × 2.3-4 cm, herbaceous, major basal lateral veins asymmetric, 1 basal, the other arising above base, abaxial surface puberulent along nerves, adaxial surface sparsely strigillose, cystoliths conspicuous, dense; base with broader half broadly cuneate or rounded, margin dentate, apex caudate. Male inflorescences solitary, simple, 6-12 × 3-9 mm; peduncle 12-25 mm; receptacle elliptic, 5-10 × 2-7 mm; bracts absent; bracteoles oblong or linear. Female inflorescences solitary, 5-7 × 3-4 mm; peduncle 0-1 mm; receptacle oblong, 3.5-5.5 × 2.5-3.5 mm; bracts triangular; bracteoles ovate or linear. Male flowers 4-merous. Fl. Aug.

* Shaded wet areas in evergreen broad-leaved forests; 1300-1400 m. NW Yunnan.