Herbs or subshrubs, 1–3 m. Roots thickened. Stems erect, terete when young; nodes not swollen; leaf and stipule scars not elevated. Leaves: stipules lanceolate, entire; petiole 3–12 cm; blade basally attached, 5–7-lobed, lobes with acute secondary lobes proximally, median lobe 5–15 cm, margins neither thickened nor revolute, remotely serrate, apex acute, surfaces glabrous, abaxial smooth. Inflorescences axillary, racemes, to 12 cm. Pedicels: staminate 3–8 mm; pistillate 10–25 mm in fruit, downcurved. Staminate flowers: calyx campanulate, 10–18 mm, lobes erect or spreading; stamens 10. Capsules 1.5 cm, finely tuberculate, not winged. Seeds globose, 12 mm.
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