Clematis terniflora (sweet autumn clematis, sweet autumn virginsbower) is a plant in the buttercup family, Ranunculaceae. It is native to northeastern Asia (China, Japan, Korea, Mongolia, Russia (Siberia), Taiwan). It was introduced into the United States in the late 1800s as an ornamental garden plant, and has naturalized in many of the eastern states. It is considered a Category II invasive plant in Florida (north and central) and some other eastern states, meaning it is invading native plant