Herbs perennial, monoecious, 10-16 cm tall, glabrous. Stems ascending or erect, simple. Leaves alternate; nanophylls absent; stipules lanceolate-linear, 2-4 × 0.5-1 mm; petiole absent; leaf blade obliquely elliptic or rhombic-elliptic, 1.5-4.5 × 1-1.5 cm, herbaceous or membranous, major basal lateral veins both arising at base of leaf blade, cystoliths conspicuous, slightly dense; base obliquely cuneate, margin dentate, apex cuspidate. Male inflorescences solitary, simple, ca. 3 mm in diam.; peduncle 0.8-2 cm; receptacle absent; bracts connate, ca. 2.5 mm; bracteoles cymbiform. Female inflorescences solitary, 30-flowered or more, 3-4 mm in diam., sessile; receptacle 2-3 mm in diam.; bracts triangular; bracteoles linear or narrowly ovate. Male flowers 4-merous. Achenes ellipsoid, 10-ribbed. Fl. Jun.

* N Guangxi.