Annual from a perennial rootstock; stems ribbed and scabrous. Leaves broadly ovate to palmate, 1.5–4.5 cm long, 1–5 cm wide, dentate to 5–7-lobed, cordate at base, sparsely scabrous on both surfaces; petiole 0.5–5 cm long, scabrous, ribbed. Male and female flowers in 2–5-flowered clusters on pedicels 2–8 mm long; petals 1–2 mm long, yellow-green. Fruit 1–1.5 cm diam., globose, glabrous, green with faint yellow stripes, on pedicels to 1.5 cm long; seeds c. 5 mm long, compressed, smooth, white-yellow, margin slightly thickened. Flowers Nov.–Apr.