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Celastrus orbiculatus
''Celastrus orbiculatus'' is a woody vine of the Celastraceae family.〔Hou, D. 1955 A revision of the genus ''Celastrus''. Annals of the Missouri Botanical Garden 42: 215–302〕 It is commonly called Oriental bittersweet.〔 Other common names include Chinese bittersweet, Asian bittersweet,〔 Round-leaved bittersweet,〔 and Asiatic bittersweet. ''Celastrus orbiculatus'' was introduced into North America in 1879,〔(''Celastrus orbiculatus'' - Oriental Bittersweet Vine ). Conservation New England. Accessed 31 October 2009.〕 and is considered to be an invasive species in eastern North America. It closely resembles the native North American species, ''Celastrus scandens'', with which it will readily hybridize.
==Description==
The defining characteristic of the plant is its vines: they are thin, spindly, and have silver to reddish brown bark. They are generally between in diameter. When ''Celastrus orbiculatus'' grows by itself, it forms thickets; when it is near a tree or shrub, the vines twist themselves around the trunk. The encircling vines have been known to strangle the host tree to death, which is also true of the American species, ''C. scandens''. The leaves are round and glossy, long, have toothed margins and grow in alternate patterns along the vines. Small green flowers produce distinctive red seeds which are encased in yellow pods that break open during autumn. All parts of the plant are poisonous.〔Richard H. Uva, Joseph C. Neal and Joseph M. Ditomaso, ''Weeds of The Northeast'', (Ithaca, NY: Cornell University Press, 1997), Pp. 336–337.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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