a genus of evergreen shrubs or trees of the family Theaceae. The simple, alternate leaves are on short leaf stalks. The large, solitary flowers are white or red. There are five or more petals and many stamens. The common camellia (Camellia japonica) and its hybrid forms have single or double odorless flowers and are raised outdoors in the Caucasus and southern Crimea and indoors (often in greenhouses). The plants of this genus are propagated by cuttings and seeds. Tea is made from the young shoots of the species C. sinensis and C. assamica. The leaves of the tea oil tree (C. sasanqua), which is native to Japan and China, yield an essential oil containing 97 percent eugenol, a valuable disinfectant used in dentistry. Species are grown in the Black Sea regions of the Caucasus.