Oriental bittersweet is a deciduous, woody, twining vine that may reach 30 m (98.5 ft) in length and 18 cm (7 in) in diameter. It climbs by coiling around trees, shrubs and any other available support. It has a deep, extensive root system. Oriental bittersweet is native to China , Korea , and Japan . It is located all around the United States and is cut in fall to make decorative wreaths which unfortunately widens the spread of this invasive plant. It was brought to the United States in the 1860's as an ornamental plant, hence the use for decoration. This invasive is dangerous to the native plants. The vine girdles trees and shrubs, cutting off the flow of water and nutrients. It is also dangerous to humans, if a tree is cut down that was tangled in the Bittersweet it could unexpectedly take down the many other trees wrapped in the vine.