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''Trachycarpus'' is a genus of nine species of palms native to Asia, from the Himalaya east to eastern China. They are fan palms (Arecaceae tribe Corypheae), with the leaves with a bare petiole terminating in a rounded fan of numerous leaflets. The leaf bases produce persistent fibres that often give the trunk a characteristic hairy appearance. All species are dioecious, with male and female flowers produced on separate plants although female plants will sometimes produce male flowers, allowing occasional self-pollination. ==Cultivation and uses== The most common species in cultivation is ''Trachycarpus fortunei'' (Chusan palm or windmill palm), which is, in cultivated range, the northernmost palm species in the world. There are several hardy ''Trachycarpus'' species that stay outdoors all year long with little to no protection at the New York Botanical Garden. The dwarf form popularly known as ''T. wagnerianus'' is unknown in the wild, and is now considered synonymous with ''T. fortunei''.〔〔Flora of China: (''Trachycarpus fortunei'' )〕〔USDA (''Trachycarpus fortunei'' )〕 It resembles that species closely, differing only in its smaller and stiffer leaves. Hybrids between them are intermediate in size and fully fertile. Recently in the UK was introduced new Trachycarpus hybrid ''Naggy'' between male T. fortunei and female T. nanus. Trachycarpus ''Naggy'' is a fast growing, attractive palm with deeply split leaves giving a very unusual appearance and is likely to be extremely hardy. T. Naggy is a recent addition in the hardy palm world hybrids and the question remains whether it will develop a tall trunk like its dad T. fortunei, or remain trunkless like its mum T. nanus.. ''Trachycarpus takil'' (the Kumaon Palm) is similar to ''T. fortunei''; and probably even hardier. Other species less common in cultivation are ''T. geminisectus'', ''T. princeps'', ''T. latisectus'', ''T. martianus'', ''T. nanus'' and ''T. oreophilus''. ''T. martianus'' and ''T. latisectus'' do not tolerate cold as well as ''T. fortunei'', ''T. takil'' or ''T. wagnerianus''. ''T. geminisectus'', ''T. princeps'' and ''T. oreophilus'' are still too rare and small in cultivation to assess their full potential. The trunk fibres produced by the leaf sheaths of ''Trachycarpus fortunei'' are harvested in China and elsewhere to make coarse but very strong rope, brooms and brushes.〔 This use gives rise to the old alternative name "hemp-palm". The fibrous leaf sheaths are also frequently used to clothe the stems of artificial palms. This genus is very popular among palm enthusiasts for its ability to withstand cold, especially in the form of damp, cool summer weather with relatively mild winter weather. These palms often tolerate snow in their native habitats and are the hardiest trunking palms. ''Trachycarpus'' species are used as food plants by the larvae of some Lepidoptera species including ''Paysandisia archon'' (recorded on ''T. fortunei''). 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「Trachycarpus」の詳細全文を読む スポンサード リンク
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