Amelopsis arborea, or pepper vine, is common in the wet areas behind dunes, along with sandy flats and marshes. The woody vine climbs other vegetation aggressively. Young leaves may be tinged red-brown or orange, turning bright green with maturity and edged by distinctive triangular teeth. Its flowers appear in clusters and yield black berries.
References
Duncan, W. H., & Duncan, M. B. (1987). The Smithsonian guide to seaside plants of the Gulf and Atlantic coasts from Louisiana to Massachusetts, exclusive of lower peninsular Florida. Washington, D.C: Smithsonian Institution Press.