It is native to central and eastern North America. Unfortunately Oriental bittersweet has also been shown to hybridize with the American bittersweet, leading to a loss of genetic identity.

Bittersweet is an ornamental climbing vine that is native to Eastern Asia. Bittersweet vines have alternate, glossy, round or oval leaves that are 2-5” long. Oriental Bittersweet (Celastrus orbiculatus) is a deciduous, woody, perennial vine native to China, Japan and Korea, that was brought to this country in the mid-1800s as an ornamental plant.Bittersweet is now considered a serious invasive species because is poses a significant threat to native plants. Fruits are round and yellow, splitting to reveal bright red berries … The alternate, elliptical leaves are light green in color, finely toothed and two to five inches in length. The vine of oriental bittersweet aggressively entwines and smothers trees and other plants; roots are bright orange; flowers are small and greenish-yellow; and fruits are pea-sized capsules that change from green to bright yellow and split open when ripe in late autumn, revealing a bright red berry within.
Oriental bittersweet is a deciduous, climbing, woody vine that can grow up to 60 feet in length.
If you like the look of vines with berries in your arrangements, you do have options. Oriental Bittersweet: Stem has blunt thorns, berries are copious, appearing all along the vine, Husks are bright yellow, Pollen is white. What is American Bittersweet Vine? Prolific producer of red-orange berries. So, with syllogistic logic, early colonists named this new bittersweet-like plant the “false bittersweet.” The berries are also toxic, ingestion resulting in relatively severe though not fatal digestive convulsions. The alternate, elliptical leaves are light green in color, finely toothed and two to five inches in length. Oriental bittersweet’s habitat on its native continent of Asia is said to be lowland slopes or thickets at altitudes from 100 to 1,400 meters. It has pleasant neutral flavor and feels very good. Vines can grow up to four inches in diameter. They are fast-growing and attractive, with light green, finely toothed leaves. A huge tangle has been growing for decades behind the garage. Note: How to tell Oriental Bittersweet and American Bittersweet apart? Celastrus orbiculatus is a woody vine of the family Celastraceae. Oriental bittersweet plants are vines that grow up to 60 feet long and can get four inches in diameter. Oriental bittersweet is considered a noxious weed in Minnesota. Bittersweet is a Christmas ninja. Oriental bittersweet is native to China, Japan and Korea. The fast growing vines can cover, shade and outcompete other vegetation.