Bittersweet nightshade is an evasive species here in North America. Originally found in Europe and Asia this semi-woody perennial vine is in the genus potato. This plant produces a berry which is poisonous to people and many animals, although the poison is not very strong and usually only ends up causing nausea in humans. Most birds are not effected by the poison and they are the typical means by which bittersweet nightshade seeds are spread. I photographed this plant at the Dodge Nature Center.