Oriental bittersweet might just be the "kudzu of the north". Since its introduction in 1860 as an ornamental plant, it has spread from Maine to North Carolina. Like kudzu, it's a vine that can grow over the tops of trees and cover fields. Oriental bittersweet grows in forests, along roadsides, and in open fields. It also grows along sand dunes and could lead to increased beach erosion. Oriental bittersweet can establish in shade and will grow rapidly in full sun. The vines twine around trees often killing smaller trees. The weight of the vines in the tree canopy make the tree susceptible to wind damage.
All photos in this article by Jil M. Swearingen, USDI National Park Service, Bugwood.org