Stems smooth and twining or climbing over surrounding vegetation, 5 to 15 feet long, from a perennial root. Leaves opposite, ovate or hastate, deeply cordate at the base with rounded basal lobes, long pointed at the apex, somewhat triangular in shape, 2 to 4 inches long, 1 to 2 inches wide, borne on slender petioles. Heads in compound clusters, borne at the ends of the branches, each head four-flowered, surrounded by oblong involucres of four narrow bracts. Corollas white or pink.

In swamps and moist soil in woods and thickets along streams or in low, wet places, Maine to western Ontario, south to Florida and Texas. Flowering from July to September.

Memoir 15 N. Y. State Museum

Plate 232

A. Climbing Hempweed Or Boneset   Mikania scandens

A. Climbing Hempweed Or Boneset - Mikania scandens