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''Camellia'' is a genus of flowering plants in the family Theaceae. They are found in eastern and southern Asia, from the Himalayas east to Japan and Indonesia. There are 100–250 described species, with some controversy over the exact number. The genus was named by Linnaeus after the Jesuit botanist Georg Joseph Kamel, who worked in the Philippines, though he never described a camellia. This genus is famous throughout East Asia; camellias are known as ''cháhuā'' (茶花) in Chinese, "tea flower", an apt designation, as ''tsubaki'' (椿) in Japanese, as ''dongbaek-kkot'' (동백꽃) in Korean and as ''hoa trà'' or ''hoa chè'' in Vietnamese. Of economic importance in the Indian subcontinent and Asia, leaves of ''C. sinensis'' are processed to create the popular beverage, tea. The ornamental ''Camellia japonica'', ''Camellia oleifera'' and ''Camellia sasanqua'' and their hybrids are represented in cultivation by a large number of cultivars. ==Description== Camellias are evergreen shrubs or small trees up to tall. Their leaves are alternately arranged, simple, thick, serrated, and usually glossy. Their flowers are usually large and conspicuous, one to 12 cm in diameter, with five to nine petals in naturally occurring species of camellias. The colors of the flowers vary from white through pink colors to red; truly yellow flowers are found only in South China and Vietnam. Camellia flowers throughout the genus are characterized by a dense bouquet of conspicuous yellow stamens, often contrasting with the petal colors.〔Mair and Hoh (2009).〕〔The International Camellia Society. ''(Flowers of Camellias )''.〕 The so-called "fruit" of camellia plants is a dry capsule, sometimes subdivided in up to five compartments, each compartment containing up to eight seeds. The various species of camellia plants are generally well-adapted to acidic soils rich in humus, and most species do not grow well on chalky soil or other calcium-rich soils. Most species of camellias also require a large amount of water, either from natural rainfall or from irrigation, and the plants will not tolerate droughts. However, some of the more unusual camellias – typically species from karst soils in Vietnam – can grow without too much water. Camellia plants usually have a rapid growth rate. Typically they will grow about 30 cm per year until mature – though this does vary depending on their variety and geographical location. Camellia plants are used as food plants by the larvae of a number of ''Lepidoptera'' species; see List of Lepidoptera that feed on Camellia. Leaves of the Japanese camellia (''C. japonica'') are susceptible to the fungal parasite ''Mycelia sterile'' (see below for the significance). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「camellia」の詳細全文を読む スポンサード リンク
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