Herbs, annual, 5–20 dm, monoecious, stems, leaves, and buds with yellow-brown (ochraceous) pubescence when young, becoming glabrate. Stems branching distally, stellate-hairy. Leaves not clustered; stipules linear, 0–5 mm; petiole 1.5–7 cm, glands absent at apex; blade ovate-lanceolate, 3–7 × 1–3 cm, base cordate to rounded or subcordate, margins entire, apex acute, abaxial surface pale green, not appearing brown-dotted, no stellate hairs with brown centers, densely stellate-hairy, adaxial surface greener, more sparsely hairy. Inflorescences bisexual, racemes, 1.5–3 cm, staminate flowers 8–15, pistillate flowers 2–7. Pedicels: staminate 0.5–3 mm, pistillate 0–1 mm. Staminate flowers: sepals (4–)5, 1.5–2 mm, abaxial surface stellate-hairy; petals 5, linear-oblong, 1–1.5 mm, abaxial surface stellate-hairy; stamens 9–13. Pistillate flowers: sepals 7–8, equal, 5–7 mm, margins entire, apex straight to slightly incurved, abaxial surface yellowish woolly-tomentose; petals 0; ovary 3-locular; styles 3, 3–4 mm, 2 times 2-fid, terminal segments 12. Capsules 6–8 × 8–9 mm, smooth; columella tipped with 3-pronged grappling hooklike appendage. Seeds 4–5 × 4–4.5 mm, shiny. 2n = 20.
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