Herbs or subshrubs, 2–7 dm. Stems erect, green, apex never flexuous. Leaves: petiole 3–15 mm; blade triangular-lanceolate, 2.7–6.7 × 1–3 cm, base truncate to cordate, margins serrate, apex acute. Inflorescences terminal (appearing leaf opposed), glands absent, staminate flowers 11–40 per raceme, evenly distributed; staminate bracts 1–1.5 mm. Pedicels: staminate 1.5–2 mm, persistent base 1–1.8 mm, longer than subtending bract; pistillate 3–4 mm in fruit. Staminate flowers: sepals 3, green, 1.2–2.1 mm; stamens 3, filaments 0.3–0.8 mm. Pistillate flowers: sepals lanceolate-ovate, 1.3–2.3 mm; styles connate 1/3 length; stigmas papillate. Capsules 7–8 mm wide. Seeds dark brown, 3–4 mm. 2n = 44.
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