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List of basil cultivars : ウィキペディア英語版 | List of basil cultivars Basil cultivars are cultivated varieties of basil. They are used in a variety of ways: as culinary herbs, landscape plants, healing herbs, teas, and worship implements. All true basils are species of the genus ''Ocimum''. The genus is particularly diverse, and includes annuals, non-woody perennials and shrubs native to Africa and other tropical and subtropical regions of the Old and New World. Although it is estimated that there are 50 to 150 species of basil,〔The Herb Garden, in the United States National Arboretum, showcases some 25 varieties of basil every year. The Herb Garden was a gift to the United States from the Herb Society of America.〕 most, but not all, culinary basils are cultivars of ''O. basilicum'', or sweet basil. Some are cultivars of other basil species, and others are hybrids. It is particularly challenging to determine which species a basil belongs to. This is because basil cross-breeds easily, and drawing boundaries between species is particularly difficult. In fact, recent studies have led to reclassification of some portions of the genus. Basil cultivars vary in several ways. Visually, the size and shape of the leaves varies greatly, from the large lettuce-like leaves of the ''Mammoth basil'' and ''Lettuce leaf basil'' to the tiny leaves of the ''Dwarf bush basil''. More practically, the fragrance of the basil varies due to the varying types and quantities of essential oils contained in the plants. The most important are 1,8 cineol, linalool, citral, methyl chavicol (estragole), eugenol and methyl cinnamate, although hardly any basil contains all of these in any significant amount.〔 ==Basil cultivars==
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