A perennial plant of the Rosaceae family. It is found throughout Japan and East Asia, and commonly grows in fields and roadsides. The stems are covered with long soft hairs, and grow long and crawl along the ground during the fruiting season. The basal leaves are long-stalked and trifoliate, with ovate leaflets and ovate-lanceolate stipules at the base of the petiole. From spring to early summer, long stalks emerge from the leaf axils and produce yellow flowers about 2 cm in diameter. There are five calyxes and five petals of the same size, and there are many stamens and pistils. The achenes are small and red and granular, and when ripe, they are scattered on the pale pink, spongy thalamus, forming a spherical aggregate. The fruit tastes bad and is not eaten, but the popular belief that it is poisonous is incorrect. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
バラ科の多年草。日本全土,東アジアに分布し,野原や路傍に普通に生える。茎は長い軟毛をかぶり,結実期に長く伸びて地面をはう。根出葉は長柄があり,3出複葉で小葉は卵形,葉柄の基部に卵状披針形の托葉がある。春から初夏にかけて,葉腋から長い花柄を出し径 2cmほどの黄色の花をつける。萼は5枚,同大の花弁が5枚あり,おしべとめしべは多数ある。痩果は小さく赤色で粒状,熟すると淡紅色で海綿状の花托上に散在し,全体として球形の集合果となる。味はまずく食用にされることはないが,この果実を有毒とする俗説は誤りである。
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