Herbs perennial, dioecious. Stems erect, simple, glabrous. Leaves alternate; stipules subulate, ca. 2 × 0.1 mm; petiole 2-4 mm; leaf blade herbaceous, obliquely elliptic, 4-10 × 1.6-3.2 cm, venation pinnate, major lateral veins ill-defined, broader outer half broadly cuneate or rounded, margin dentate, apex acuminate; cystoliths conspicuous, dense; nanophyll absent. Staminate inflorescences 1.6-2.8 cm in diam., peduncle 1.5-2.5 cm; staminate flowers: tepals 5, elliptic; stamens 5; rudimentary pistil small. Pistillate inflorescences ca. 5 mm in diam., sessile; pistillate flowers: tepals 5. Achenes ovoid, striolate. Fl. May-Jun.
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