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''Cinnamomum camphora'' (commonly known as camphor tree, camphorwood or camphor laurel) is a large evergreen tree that grows up to tall.〔 The leaves have a glossy, waxy appearance and smell of camphor when crushed. In spring, it produces bright green foliage with masses of small white flowers. It produces clusters of black, berry-like fruit around in diameter. Its pale bark is very rough and fissured vertically. ''Cinnamomum camphora'' is native to China south of the Yangtze River, Taiwan, southern Japan, Korea, and Vietnam, and has been introduced to many other countries. In Japan, where the tree is called ''kusunoki'', five camphor trees are known with a trunk circumference above 20 m, with the largest tree (''Kamou no Ohkusu'') reaching the circumference of 24.22 m.〔(【引用サイトリンク】title=Kamou no Ohkusu )〕 ==Chemical constituents== Camphor laurel contains volatile chemical compounds in all plant parts, and the wood and leaves are steam distilled for the essential oils. Camphor laurel has six different chemical variants called chemotypes, which are camphor, linalool, 1,8-cineole, nerolidol, safrole, or borneol. In China, field workers avoid mixing chemotypes when harvesting by their odour.〔Hirota, N. and Hiroi, M., 1967. ‘The later studies on the camphor tree, on the leaf oil of each practical form and its utilisation’, ''Perfumery and Essential Oil Record'' 58, 364-367.〕〔Lawrence, B. M., 1995. ‘Progress in essential oils’, ''Perfumer and Flavorist'', 20, 29-41.〕 The cineole fraction of camphor laurel is used in China to manufacture fake "Eucalyptus oil".〔(Ashurst, P.R., ''Food Flavorings'', 1999 )〕 The chemical variants (or chemotypes) seem dependent upon the country of origin of the tree. The tree is native to China, Japan, and Taiwan. It has been introduced to the other countries where it has been found, and the chemical variants are identifiable by country. e.g., ''C. camphora'' grown in Taiwan and Japan is normally very high in linalool, often between 80 and 85%. In India and Sri Lanka, the high camphor variety/chemotype remains dominant. ''C. camphora'' grown in Madagascar, though, is high in 1,8 cineole (averaging between 40 and 50%). The essential oil from the Madagascar trees is commercially known as ''ravintsara''.〔Behra, Burfield, www.cropwatch.org/Ravensara-Ravintsara%20biblio%20v1.01.pdf〕 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「Cinnamomum camphora」の詳細全文を読む スポンサード リンク
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