Herbs dioecious, 5-20 cm tall. Stems ascending or erect, usually simple, pilose, furfuraceous. Leaves usually opposite, glabrous or glabrescent; nanophylls elliptic to lanceolate, 2-6 mm; stipules obscure; petiole 1-2 mm; leaf blade obliquely cuneate, obliquely elliptic, or lanceolate, 0.8-4(-6.5) × 0.4-1.2(-2) cm, herbaceous or membranous, major basal lateral veins both arising at base of leaf blade, cystoliths conspicuous, sparse or present only along margins; base obliquely cuneate, margin dentate or pinnatifid, apex acute to acuminate. Male inflorescences solitary, simple, 1.5-2 mm in diam.; peduncle 0-1 mm; receptacle obscure; bracts connate, 2-2.5 mm; bracteoles lanceolate to linear. Female inflorescences solitary, 2-5 mm in diam., sessile; receptacle small; bracts broadly ovate; bracteoles spatulate-linear. Male flowers 4-merous. Achenes ellipsoid, 6-ribbed. Fl. Jun-Oct.
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