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わが国の本州、京都府北部の美山町「堀越峠」に自生しています。「やまあじさい(山紫陽花)」の一品種で、八重咲きなのが特徴です。5月下旬から6月下旬に、鮮やかな青紫色の花を咲かせます。酸性土壌では濃紫色に、中性土壌でピンク色に色づきます。
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アジサイ科アジサイ属の落葉低木で、学名は Hydrangea serrata f. Miyama-yaemurasaki。英名はありません。
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The "Miyama-yaemurasaki" (Hydrangea serrata f. Miyama-yaemurasaki) belongs to Hydrangeaceae (the Hydrangea family). It is a small deciduous tree that grows wild in the Horikoshi Pass in Miyama Town in the northern part of Kyoto Prefecture in Honshu, Japan. It is a variety of the "Yama-ajisai", characterized by its double-petaled flowers, which bloom from late May to late June with bright blue-purple blossoms. The flowers turn dark purple in acidic soils and pink in neutral soils.
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京都府宇治市「宇治市植物公園」にて、2004年05月29日撮影。
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