Description from Flora of China
Herbs perennial, monoecious, 20-26 cm tall. Stems ascending or erect, simple, rarely branched at base, pubescent. Leaves alternate; nanophylls absent; stipules linear, ca. 3 × 0.8 mm, glabrous; without cystoliths, petiole absent; leaf blade obliquely lanceolate, 1.2-5 × 0.9-1.5 cm, herbaceous, major basal lateral veins asymmetric, 1 basal, the other arising above base, abaxial surface sparsely puberulent along veins, adaxial surface glabrous, cystoliths conspicuous, dense; base with broader half auriculate, margin crenate-denticulate, apex caudate-acuminate. Male inflorescences solitary, simple, 9-12 × 4-6 mm, sessile; receptacle obscure; bracts connate, 9-12 mm; bracteoles narrowly triangular or linear-triangular. Female inflorescences solitary, 30-flowered or more, 2-4 mm in diam., sessile; receptacle ca. 2 mm in diam.; bracts triangular; bracteoles linear or cymbiform. Male flowers 5-merous. Fl. Feb.
* Mountain forests; 1200-1300 m. SE Yunnan.