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わが国の本州、東北地方以北から北海道に分布しています。山地の岩場や岩上に生え、高さは15〜45センチになります。葉は長楕円形で浅い鋸歯があり、星状毛があります。5月から6月ごろ、白色の花を総状花序に咲かせます。
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アブラナ科ハタザオ属の多年草で、学名は Arabis serrata var. japonica。英名はありません。
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The "Iwa-hatazao" (Arabis serrata var. japonica) belongs to Brassicaceae (the Mustard family). It is a perennial herb that is distributed northward from Tohoku district of Honshu to Hokkaido. This herb grows on rocky places and rocks of mountains, and can reach 15-45 cm in height. The leaves are oblong with low toothed edges and stellate hairs. The white flowers bloom in racemes from May to June.
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[上・中1〜2] 福島県磐梯町「磐梯山」にて、2012年06月23日撮影。 [中3〜7・下] 福島県喜多方市山都町一ノ木にて、 2016年05月02日撮影。
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