Herbs perennial, monoecious. Stems ascending, branched, densely retrorse-strigose. Leaves alternate; stipules subulate, 1-2 × 0.1-0.2 mm; petiole 1-3 mm; leaf blade herbaceous, obliquely elliptic, 1.5-4.4 × 0.9-2 cm, major lateral veins asymmetric, one basal, the other arising above base, broader outer half auriculate, margin dentate, apex acuminate, acute or acutate; cystoliths obscure; nanophyll absent. Staminate inflorescences 0.5-1.2 cm in diam., peduncle 1-2.5 cm; staminate flowers: tepals 5, narrowly elliptic; stamens 5; rudimentary pistil triangular. Pistillate inflorescences to 3 mm in diam., peduncle to 1 mm or absent; pistillate flowers: tepals 5. Achenes ellipsoidal, tuberculate. Fl. Dec.

Mountain forests; ca. 1300 m. SE Yunnan [N Vietnam].