A perennial plant of the Rosaceae family that grows wild in the mountains of Japan (illustration). It is 0.3-1m tall and has compound leaves with two triplicates. The leaflets are ovate, 5-10cm long, and have sawtooth edges. It is dioecious and produces flowers in clusters from June to August. The male flowers have about 20 stamens, and the female flowers later produce three oblong capsules about 2mm long. It is distributed from Hokkaido to Kyushu, and as a species it is widely found in the temperate zone of the Northern Hemisphere. There is a great deal of variation in the size of the plant body and the shape of the leaflets, and several other varieties are distinguished even in Japan. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
日本の山地に自生するバラ科の多年草(イラスト)。高さ0.3~1m,葉は2回3出の複葉。小葉は卵形で長さ5~10cm,縁には鋸歯がある。雌雄異株で,6~8月,総状に花をつける。雄花には,約20本のおしべがあり,雌花は,あとで長楕円形で長さ約2mmの袋果を3個つける。北海道から九州まで分布し,種としては北半球の温帯にひろく見られ,植物体の大きさ,小葉の形などに非常に変化が多く,日本でも,ほかにいくつかの変種が,区別されている。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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