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| Paperbark Maple ： ウィキペディア英語版 |
Acer griseum
''Acer griseum'' (paperbark maple; ) is a species of flowering plant in the family Sapindaceae, native to central China.〔Flora of China (draft): (''Acer griseum'' )〕 ''Acer griseum'' is found in the Chinese provinces of Gansu, Henan, Hubei, Hunan, Shaanxi, Shanxi and Sichuan, at altitudes of .〔
==Description==
It is a small to medium-sized deciduous tree, reaching tall and wide, with a trunk up to in circumference.〔http://www.maple-trees.com/pages/paperbark-maple.php〕 The bark is smooth, shiny orange-red, peeling in thin, papery layers; it may become fissured in old trees. The shoots are densely downy at first, this wearing off by the second or third year and the bark exfoliating by the third or fourth year.〔
The leaves are compound, with a 2–4 cm petiole with three leaflets, each 3-10 cm long and 2-6 cm broad, dark green above, bright glaucous blue-green beneath, with several blunt teeth on the margins.〔
The yellow flowers are androdioecious, produced in small pendent corymbs in spring, the fruit being a paired samara with two winged seeds about 1 cm long with a 3 cm wing.〔〔Rushforth, K. (1999). ''Trees of Britain and Europe''. Collins ISBN 0-00-220013-9.〕〔
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 griseum」の詳細全文を読む
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