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わが国の本州、上越地方から東北地方南部に分布しています。「おおばきすみれ(大葉黄菫)」の変種で、山地帯から亜高山帯の砂礫地に生えます。心形の葉は厚くて光沢があり、茎は紅紫色を帯びます。6月ごろ、黄色い花を咲かせます。和名は、基準標本産地の新潟・長野の県境にある苗場山に因みます。
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スミレ科スミレ属の多年草で、学名は Viola brevistipulata var. kishidai。英名はありません。
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"Naeba-ki-sumire" (Viola brevistipulata var. kishidai) belongs to Violaceae (the Viola family). It is a perennial herb that is distributed from the Joetsu region to the southern Tohoku region in Honshu, Japan. It is a variant of the "Ooba-kisumire" and grows in sandy and gravelly areas in mountainous to subalpine zones. The heart-shaped leaves are thick and glossy, and the stems are reddish-purple. The Japanese name is derived from Mt. Naeba on the border between Niigata and Nagano prefectures, where the type specimen is grown.
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長野県山ノ内町「東舘山高山植物園」にて、2003年06月15日撮影。
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