こしのちゃるめるそう (越の哨吶草) [Index] [Back] わが国の本州、新潟県および富山県東部に分布しています。海岸沿いの谷川沿いや林内の陰湿地に生え、高さは２０〜５０センチになります。地中の根茎はやや長く横に這います。葉身は広卵形で、基部は心形、縁は浅く５裂し、さらに不揃いな鋸歯があります。葉の両面には白色の長毛が生えます。４月から５月にかけて、花茎を伸ばして、先端に総状花序をだし、小さな赤紫色の花を咲かせます。花弁は５個あり、羽状に細く５〜９裂して「魚の骨状」に見えます。果実は�刮ﾊです。 ユキノシタ科チャルメルソウ属の多年草で、学名は Mitella koshiensis (syn. Asimitellaria koshiensis)。英名はありません。 The "Koshino-charumeru-so" (Mitella koshiensis) belongs to Saxifragaceae (the Saxifrage family). It is a perennial herb that is distributed in Niigata Prefecture and eastern Toyama Prefecture in Honshu, Japan. It grows along coastal streams and in shaded, damp areas within forests, reaching a height of 20 to 50 cm. Its underground rhizomes are somewhat long and spread horizontally. The leaf blades are broadly ovate, with a heart-shaped base; the margins are shallowly 5-lobed and further irregularly serrated. Both surfaces of the leaves are covered with long white hairs. From April to May, it extends a flower stalk, producing a raceme at the tip and blooming with small reddish-purple flowers. There are five petals, which are pinnately divided into 5 to 9 narrow lobes, giving them a "fishbone-like" appearance. The fruit is a capsule. 茨城県つくば市「つくば実験植物園」にて、2026年03月07日撮影。 Shu Suehiro shu@botanic.jp