Herbs, climbing by tendrils. Flowers monoecious. Calyx-tube adherent to the 1-3-celled ovary. Corolla commonly more or less gamopetalous. Stamens usually 3, united by their tortuous anthers, and often also by the filaments. Leaves alternate, palmately lobed or veined.
1. Si'cyos. Flowers greenish-white, small; the staminate corymbed, the pistillate clustered in a head on a long peduncle. Corolla 5-cleft, with a spreading border. Style slender; stigmas 3. Ovary 1-celled. Fruit dry and indehiscent, prickly, bur-like in appearance.
2. Echinocys'tis. Flowers whitish, small; the staminate in long compound racemes, the pistillate in small clusters from the same axils. Corolla 6-parted. Stigma broad, almost sessile. Ovary 2-celled, 4-seeded. Fruit fleshy, becoming dry, clothed with weak prickles.
S. angula'tus, L. A clammy-hairy weed in damp yards. Leaves roundish heart-shaped, 5-angled or lobed.
Torr, and Gray. Wild Balsam-Apple. E. lobata, Torr, and Gray. Climbing high about dwellings. Leaves deeply and sharply 5-lobed. The oval fruit 2 inches long.