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Quercus acuta
''Quercus acuta'', the Japanese evergreen oak, is an oak native to Japan, South Korea, Taiwan, and China's Guizhou Province and Guangdong Province.〔"Quercus acuta"(Oaks of the World ) Accessed 8 April 2011.〕 Due to its foliage and habitat, it looks rather unlike most other oaks.
''Quercus acuta'' is usually bushy and densely domed, reaching a height of 14 meters. The bark is smooth and dark grey. Leaves are dark and glossy above and yellowish beneath. They narrow to a long, finely-rounded tip. The flowers are on a stiff 5 cm catkin.
Often called Japanese white oak or shiro kashi, it is a standard choice for Japanese martial arts practice weapons such as bokken, because it has a uniformly tight grain structure due to its continuous growing season.〔James Goedkoop: "Woods for Training Weapons". ''Aikiweb'' () Accessed 10 November 2012.〕 It should not be confused with the oriental or Asian white oak, ''Quercus aliena''.
==References==
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「Quercus acuta」の詳細全文を読む
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