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わが国の本州、中部地方以北から北海道、それに四国の石鎚山に分布しています。亜高山帯の針葉樹林からハイマツ低木林の林下に生え、高さは1〜2メートルになります。長楕円形の葉は厚くて外側に巻き込み、葉柄があります。6月から7月ごろ、枝先に白色から淡紅色、淡いクリーム色などの花を10〜20個ほど咲かせます。
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ツツジ科ツツジ属の常緑低木で、学名は Rhododendronbrachycarpum。英名はありません。
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"Hakusan-shakunage" (Rhododendron brachycarpum) belongs to Ericaceae (the Azalea family). It is a small evergreen tree that is distributed norhward from Chubu district of Honshu to Hokkaido, and Mt. Ishizuchi of Shikoku in Japan. This tree grows in sub-alpine coniferous forests or thickets of Dwarf Siberian pine, and can reach 1-2 m in height. The leaves are thick, petiolated and convolute outside. The flowers are white, pale rose pink or pale cream, and 10-20 flowers bloom on the terminal branches from June to July.
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[上・中1〜3] 福島県北塩原村「デコ平湿原」にて、2009年06月28日撮影。 [中4] 長野県東御市新張「湯の丸高原」にて、2005年07月09日撮影。 [中5] 長野県小谷村千国乙「栂池自然園」にて、2006年08月02日撮影。 [中6] 秋田県藤里町太良「駒ヶ岳」にて、2005年07月17日撮影。 [中7・中8] 群馬県嬬恋村千俣「白根山」にて、2005年07月12日撮影。 [中9〜中11] 福島市土湯温泉町「浄土平」にて、2013年07月20日撮影。 [中12〜中15] 福島県北塩原村「猫魔ヶ岳」にて、2014年06月14日撮影。 [中15〜中17] 福島市土湯温泉町「家形山」にて、2014年07月05日撮影。 [中18〜中20] 福島県磐梯町「磐梯山」にて、2016年07月09日撮影。 [中21〜中23] 長野県白馬村「唐松岳」にて、2016年07月30日撮影。 [中24〜中33] 秋田県仙北市「秋田駒ヶ岳」にて、2019年07月09日撮影。 [中34〜中37] 秋田県仙北市「乳頭山」にて、2019年07月10日撮影。 [中38・中39] 群馬県片品村「鳩待峠」にて、2015年07月05日撮影。 [中40・中41] 岩手県八幡平市「八幡平」にて、2021年07月25日撮影。 [中42・下] 岩手県八幡平市「黒谷地湿原」にて、2021年07月25日撮影。
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