Slender, woody, high-climbing; lvs variable, even on the same plant, lanceolate to broadly obovate, 5-12 cm, on petioles 2-15 mm; cymes long-peduncled, many-fld, produced in only one axil of a pair of lvs; cor-tube 6 mm, the lobes 3-4 mm; fr 15-25 cm. Moist or wet woods on the coast plain; Del. to Tex., n. in the interior to sw. Ind. and se. Mo. July.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.