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''Ulmus parvifolia'', commonly known as the Chinese elm or lacebark elm, is a species native to eastern Asia, including China, India, Taiwan, Japan, North Korea, and Vietnam.〔Fu, L., Xin, Y. & Whittemore, A. (2002). (Ulmaceae ), in Wu, Z. & Raven, P. (eds) ''Flora of China'', Vol. 5 (Ulmaceae through Basellaceae). Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis, USA; also available as 〕 It has been described as "one of the most splendid elms, having the poise of a graceful ''Nothofagus''".〔 The tree was introduced to the UK in 1794. 〔 Bean, W. J. (1981). ''Trees and shrubs hardy in Great Britain'', 7th edition. Murray, London.〕 ==Description== A small to medium deciduous, semi-deciduous (rarely semi-evergreen) tree growing to tall and wide with a slender trunk and crown. The leathery, lustrous green single-toothed leaves are small, 2–5 cm long by 1–3 cm broad, and often retained as late as December or even January in Europe and North America. The apetalous wind-pollinated perfect flowers are produced in early autumn, small and inconspicuous. The fruit is a samara, elliptic to ovate-elliptic, 10–13 mm long by 6–8 mm broad.〔 The samara is mostly glabrous, the seed at the centre or toward the apex, borne on a stalk 1–3 mm in length; it matures rapidly and disperses by late autumn. The trunk has a handsome, flaking bark of mottled greys with tans and reds, giving rise to its other common name, the lacebark elm, although scarring from major branch loss can lead to large canker-like wounds.〔 〔White, J & More, D. (2003). ''Trees of Britain & Northern Europe''. Cassell's, London.〕〔http://www.cnr.vt.edu/dendro/dendrology/syllabus/uparvifolia.htm〕〔(PLANTS Profile for Ulmus pumila (Siberian elm) | USDA PLANTS )〕〔''Ulmus parvifolia'' photographs and fact-page, Michigan State University ''Plant Encyclopedia'' ()〕 Image:Ulmus parvifolia, juvenile.jpg|''U. parvifolia'' juvenile Image: RN Ulmus parvifolia leaves and seeds.JPG|Foliage and fruit Image:RN Ulmus parvifolia bark.JPG|Bark Many nurserymen and foresters mistakenly refer to ''Ulmus pumila'', the rapidly growing, disease-ridden, relatively short-lived, weak-wooded Siberian elm, as "Chinese elm." This has given the true Chinese elm an undeserved bad reputation. The two elms are very distinct and different species. Among other obvious differences, with age the Siberian elm's bark becomes deeply ridged and furrowed, and possesses a very rough, greyish-black appearance, while the Chinese elm's smooth bark becomes flaky and blotchy, exposing very distinctive, light-coloured mottling, hence the synonym ''lacebark elm'' for the real Chinese elm.〔 Leopold, D. J. (1980). Chinese and Siberian Elms. ''Journal of Arboriculture'' 6(7): July 1980. 175–179.()〕 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「Ulmus parvifolia」の詳細全文を読む スポンサード リンク
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