Asclepias gonocarpos (Walter) J. F. Gmelin; Gonolobus gonocarpos (Walter) L. M. Perry; G. laevis Michaux var. macrophyllus A. Gray; G. tiliifolius Decaisne; Matelea gonocarpos (Walter) Shinners; Vincetoxicum gonocarpos Walter

Flowers: corolla lobes multi­colored adaxially, generally dark maroon to brownish near base and green to yellowish near tips at anthesis (or uniformly yellowish green to neon green in rare mutants), pubescent or glabrous; dorsal anther appendages dark purple or maroon tinted.

Flowering Apr–Sep; fruiting Jul–Nov. Moist woods in bottomlands, along streams, around lakes; 30–300 m; Ala., Fla., Ga., Ky., La., Miss., N.C., S.C., Tenn., Va.