Herbs, perennial, 2–5 dm, monoecious. Stems erect, short-pubescent and hirsute. Leaves: petiole 0.2–1 cm; blade rhombic-ovate to ovate, or proximal suborbiculate, 2–6 × 1–3 cm, base acute to rounded, margins serrate to crenate-serrate, apex acute to acuminate. Inflorescences bisexual, terminal; peduncle 0.3–0.5(–1) cm, pistillate portion 4–7 × 1.6–2 cm, staminate portion 0.5–3.5 cm; allomorphic pistillate flowers rarely present, replacing all or part of staminate portion of inflorescence. Pistillate bracts (normal flowers) loosely arranged (inflorescence axis visible between bracts), 8–12 × 7–11 mm, abaxial surface sparsely pubescent and stipitate-glandular; lobes (3–)5–7(–8), triangular to attenuate, 1/5–1/3 bract length or terminal lobe longer; of allomorphic flowers absent. Pedicels of allomorphic flowers 3–5 mm. Pistillate flowers: pistil 3-carpellate (normal flowers), 2-carpellate (allomorphic flowers); styles multifid or laciniate. Capsules muricate, pubescent; allomorphic fruits obovoid, 2 × 1.5 mm, muricate, pubescent. Seeds 1.5–2 mm, minutely pitted. 2n = 40 (Mexico).
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