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ヨーロッパが原産です。アルプスやアペニン山脈、バルカン山脈、ピレネー山脈などの標高1500〜3200メートルの岩礫地に生え、高さは50〜100センチになります。葉は卵形から長楕円形で光沢があり、縁が内側に反り返ります。6月ごろ、茎の先に散形花序をだし、ピンク色の花を咲かせます。
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ツツジ科ツツジ属の常緑低木で、学名は Rhododendron ferrugineum。英名は Alpenrose、Alpine rose。
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The Alpenrose (Rhododendron ferrugineum) belongs to Ericaceae (the Azalea family). It is a small evergreen tree that is native to Europe, from the Alps to the Apennine, the Balkan and the Pyrenees mountains. This tree grows in rocky areas 1500-3200 m elevation and can reach 50-100 cm in height. The leaves are ovate to oblong and glossy with inside recurving edges. The umbels are borne at the terminal branches and bloom pink flowers in June.
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[上・中1] スイス・ベルン州・インターラーケン「シーニゲプラッテ高山植物園」にて、2007年06月27日撮影。(photo by Jon Suehiro) [中13・中14] 同上にて、2009年06月30日撮影。(photo by Jon Suehiro) [中2] スイス・ベルン州・グリンデルワルト「バッハアルプゼー」にて、2007年06月28日撮影。(photo by Jon Suehiro) [中3〜中6] スイス・ベルン州・クライネシャイデックにて、2007年06月30日撮影。(photo by Jon Suehiro) [中8〜中12] 同上にて、2009年06月28日撮影。(photo by Jon Suehiro) [中7] 大阪市鶴見区「咲くやこの花館」にて、2005年09月07日撮影。 [下] スイス・ベルン州グリンデルワルトにて、2008年06月20日撮影。(photo by Jon Suehiro)
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