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わが国の固有種で、本州の中部地方以北から東北地方に分布しています。亜高山帯から高山帯の草地に生え、高さは10〜30センチになります。根生葉はほとんど円形で長い葉柄があり、茎葉は茎を抱きます。「くもまにがな」の白花品種で、7月から8月ごろ、枝先に白色の頭花を咲かせます。舌状花は8〜11個あります。
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キク科ニガナ属の多年草で、学名は Ixeris dentata ssp. kimurana f. albescens。英名はありません。
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The "Shirobana-kumoma-nigana" (Ixeris dentata ssp. kimurana f. albescens) belongs to Asteraceae (the Aster family). It is a perennial herb that is endemic to Japan and distributed northward from Chubu district to Tohoku district of Honshu. This herb grows in sub-alpine to alpine grasslands and can reach 10-30 cm in height. It is a white-flowered form of "Kumoma-nigana". The radical leaves are almost round with long petioles and the cauline leaves enford stems. The white flower-heads bloom in the terminal clusters from July to August. They have 8-11 ray flowers.
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[上・中1〜2・中4] 長野県白馬村「八方尾根」にて、2006年08月25日撮影。 [中3] 同上にて、2008年08月09日撮影。(photo by Aya Suehiro) [中5〜中8] 長野県白馬村「唐松岳」にて、2016年07月30日撮影。 [中9・下] 岩手県八幡平市「八幡平」にて、2021年07月25日撮影。
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