Celastrus is a genus of ca. 30 species native to tropical and warm-temperate regions (predominantly in the northern hemisphere). None is native in Europe but six species are cultivated as ornamentals (Vickery 1997). One species, Celastrus orbiculatus, is often considered to be a noxious environmental weed outside its native distribution range.
Hou D. (1955) A revision of the genus Celastrus. Ann. Missouri Bot. Gard. 42: 215-302.
Vickery A.R. (1997) Celastrus. In: Cullen J. & al. (eds.), The European Garden Flora, vol. 5. Cambridge University Press, Cambridge: 178-179.