Herbs, annual, 5–15 dm, dioecious. Stems much-branched distally, stellate-hairy. Leaves not clustered; stipules rudimentary; petiole 0.5–1.5 cm, glands absent at apex; blade elliptic, 2.5–6 × 1–2 cm, base rounded, margins entire, apex short-rounded, abaxial surface grayish green, densely stellate-tomentose, adaxial surface olive green, stellate-tomentose. Inflorescences unisexual; staminate subspicate to racemose or paniculate, 3–6 cm, flowers 3–20; pistillate capitate, 0.1–0.7 cm, flowers 1–3. Pedicels: staminate 0.5–2 mm, pistillate 0.5–1.5 mm (1–3.5 mm in fruit). Staminate flowers: sepals (5–)6, 3 mm, abaxial surface lanose, margins ciliate; petals 0; stamens 10–15. Pistillate flowers: sepals 5, equal, 2 mm, margins entire, apex incurved and ± hooded, abaxial surface densely stellate-hairy; petals 0; ovary 3-locular; styles 3, 2 mm, irregularly 2–3 times 2-fid, terminal segments 24, forming matted cluster. Capsules 8–9 × 9–10 mm, verrucose; columella 3-winged. Seeds 6–7 mm diam., shiny.
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