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''Acer macrophyllum'' (bigleaf maple or Oregon maple) is a large deciduous tree in the genus ''Acer''. It can grow up to tall,〔Maple Measure, 2014, by Arborist M. D. Vaden: (''160.43 ft. Acer macrophyllum'' )〕〔Tall Tale of Humboldt Honey: (''157.8 ft. Acer macrophyllum'' )〕 but more commonly reaches tall. It is native to western North America, mostly near the Pacific coast, from southernmost Alaska to southern California. Some stands are also found inland in the foothills of the Sierra Nevada mountains of central California, and a tiny population occurs in central Idaho. ==Description== It has the largest leaves of any maple, typically across, with five deeply incised palmate lobes, with the largest running to . In the fall, the leaves turn to gold and yellow, often to spectacular effect against the backdrop of evergreen conifers. The flowers are produced in spring in pendulous racemes long, greenish-yellow with inconspicuous petals. The fruit is a paired winged samara, each seed in diameter with a wing.〔〔〔 In the more humid parts of its range, as in the Olympic National Park, its bark is covered with epiphytic moss and fern species. 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 macrophyllum」の詳細全文を読む スポンサード リンク
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