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''Acer crataegifolium '' (hawthorn-leaf maple or uri maple; Japanese: ウリカエデ ''urikaede'', "melon maple"), is a species of maple in the snakebark maple group, native to mountains forests of central and southern Japan, on Honshū (Fukushima southward), Kyūshū, and Shikoku.〔Kanon tree book: (''Acer crataegifolium'' ) (in Japanese; (google translation ))〕〔Kanagawa Prefecture trees and shrubs: (''Acer crataegifolium'' ) (in Japanese; (google translation )). (Archived ) 2009-10-24.〕〔van Gelderen, C. J. & van Gelderen, D. M. (1999). Maples for Gardens: A Color Encyclopedia〕〔Germplasm Resources Information Network: (''Acer crataegifolium'' )〕 It is a deciduous small tree or shrub that grows to a height of 5–10 m, with a trunk up to 30 cm diameter. The bark is green to greenish-brown, with narrow vertical white or pale grey stripes; the young shoots are slender, green to purplish-red and the buds purplish-red. The leaves are 5-8 cm (rarely to 15 cm) long and 4-7 cm broad, dark green to bluish green and often tinged reddish above, paler green below, ovate-triangular, and may be either unlobed or three-lobed; the petiole is red, 2–3 cm long. The flowers are small, pale yellow, produced on arched to drooping racemes 3–5 cm long. The fruit is a paired samara 1–2 cm long, pink or red maturing brown, with nutlets not more than 4 mm wide.〔〔〔〔Rushforth, K. (1999). ''Trees of Britain and Europe''. Collins ISBN 0-00-220013-9.〕 There are two varieties:〔 *''A. crataegifolium'' var. ''crataegifolium''. Leaves up to 7 cm long. *''A. crataegifolium'' var. ''macrophyllum'' Hara. Leaves up to 15 cm long. The Japanese name ''urikaede'' refers to the bark pattern resembling the skin of a melon, as also in the similar bark of ''Acer rufinerve'' (''urihadakaede'').〔 The scientific name derives from the supposed resemblance of its leaves to those of hawthorns (''Crataegus''), though this is somewhat fanciful, only making sense if certain species of hawthorn are considered.〔 ==Cultivation== It is a somewhat difficult maple to propagate, and is rarely seen outside of sizable collections. Examples may be seen in Westonbirt Arboretum (Gloucestershire, England) and the Arnold Arboretum (Boston, USA). The rare cultivars 'Me uri no ofu' and 'Veitchii' both have striking white and pink variegation.〔 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「Acer crataegifolium」の詳細全文を読む スポンサード リンク
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