This species is local and has been found in only Knox, Gibson, Posey, and Montgomery Counties on the low borders of sloughs and ponds. It is usually associated with buttonbush.

High-climbing vine with bright purplish-red branches; lvs triangular-ovate to subrotund, 8-14 cm, 3-5-lobed, often to below the middle, sparsely pubescent beneath on the veins and in the vein-axils, the terminal lobe in 3-lobed lvs triangular and prolonged to an acuminate tip, in 5-lobed lvs constricted at base to rounded sinuses; infls 8-15 cm; fr black, slightly or not at all glaucous. Swamps; s. Ind., c. Ill., and Mo. to La. and Tex.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

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