Herbs perennial, monoecious. Stems erect, branched, pubescent. Leaves alternate; stipules subulate or linear, 2.5-3.5 × 0.3-0.6 mm; petiole 0.5-1 mm; leaf blade papery, obliquely oblong or narrowly elliptic, 2-5 × 0.8-1.8 cm, venation pinnate, major lateral veins ill-defined, broader outer half cuneate, margin denticulate, apex acuminate or caudate-acuminate; cystoliths conspicuous, dense; nanophyll absent. Staminate inflorescences 3-8 mm in diam., peduncle 0.7-1.2 cm; staminate flowers: tepals 5, elliptic; stamens 5; rudimentary pistil small. Pistillate inflorescences ca. 2.5 mm in diam., sessile; pistillate flowers: tepals 5. Achenes ellipsoidal, smooth. Fl. Nov.

* Limestone valleys, rocks in forests; ca. 1400 m. Guangxi (Longlin).