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''Acer miyabei'' (Miyabe's or Miyabe Maple; Japanese: クロビイタヤ： ''kurobiitaya'') is a species of maple native to Japan, where it occurs in Hokkaidō and the Tōhoku region in northern Honshū.〔Rushforth, K. (1999). ''Trees of Britain and Europe''. Collins ISBN 0-00-220013-9.〕 It is a small to medium-sized deciduous tree growing to 10–20 m tall, with a trunk 30–40 cm diameter with rough, grey-brown bark. The leaves are five-lobed (the basal pair of lobes usually small), 7–20 cm long and 12–20 cm broad, with a 5–15 cm long petiole; the petiole bleeds white latex if cut. The flowers are produced in spring at the same time as the leaves open, yellow-green, in erect corymbs. The fruit is a samara with two winged seeds aligned at 180°, each seed 8 mm wide, flat, with a 2 cm wing.〔〔Les Erables: (''Acer miyabei'' ) (in French)〕 It is an endangered species, confined to scattered locations close to streams and rivers.〔〔(Red List of Threatened Plants of Japan )〕 There are two varieties:〔Search for kurobiitaya ((in Japanese) ); google (translation )〕 *''Acer miyabei'' var. ''miyabei''. Samaras downy. *''Acer miyabei'' var. ''shibatai'' (Nakai) Hara. Samaras hairless. It is closely related to ''Acer miaotaiense'' from China (some authors treat this as a subspecies of ''A. miyabei'', as ''Acer miyabei'' subsp. ''miaotaiense'' (P.C.Tsoong) E.Murray), and to ''Acer campestre'' from Europe.〔〔〔Flora of China (draft): (''Acer'' )〕 ==Uses== This tree is cultivated as an ornamental plant in the United States, but is not common in trade. It is most often found in arboreta. It withstands cold temperatures, urban conditions, and drought once established. It is a non-invasive substitute for Acer platanoides. A dense, uniform cultivar has been selected at the Morton Arboretum named ''Acer miyabei'' 'Morton' and marketed under the trade name State Street® maple. 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 miyabei」の詳細全文を読む スポンサード リンク
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