Herbs perennial, monoecious, ca. 40 cm tall. Stems ascending or erect, branched, glabrous. Leaves alternate; nanophylls absent; stipules lanceolate-linear, 3-4 mm, ciliolate; petiole 0-5 mm; leaf blade obliquely elliptic or oblong, 5.5-10.5 × 1.5-3.5 cm, herbaceous, major basal lateral veins ± absent and venation pinnate, abaxial surface glabrous, adaxial surface sparsely puberulent or glabrous, cystoliths conspicuous, dense; base obliquely cuneate, margin dentate, apex caudate-acuminate. Male inflorescences solitary, simple, ca. 13 mm in diam.; peduncle 1-3 mm; receptacle ca. 9 mm in diam.; bracts connate, ca. 2 mm; bracteoles spatulate. Female inflorescences solitary, nearly orbicular, 5-9 mm in diam., sessile; receptacle nearly orbicular, 4-8 mm in diam.; bracts triangular; bracteoles cuneate. Male flowers 5-merous. Achenes ellipsoid, 4-ribbed. Fl. Aug.

* Grassy banks along streamsides. Guangxi (Longlin).