Cayratia japonica (Thunb.) Gagn.

Japanese: ヤブカラシ（英語表記）Cayratia japonica (Thunb.) Gagn.

A perennial climbing weed of the Vitaceae family (illustration), commonly found on roadsides, in gardens, and around the edges of fields. Its name "Yabu-kazura" comes from the fact that it grows vigorously and will wither even bushes it entangles, but it is also known as "binbou kazura." The stems are tendrils that grow long and wrap around other things, and are reddish when young. The leaves are alternate and arranged opposite the tendrils, and are compound leaves with five bird's foot-shaped leaflets. The flowers are small, and form cymes that open in July and August. The four green petals fall off when they open, revealing a pale pink disk.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

道端や庭や畑の縁などに多いブドウ科の多年生のつる性雑草（イラスト）。生長力が旺盛でこれがからまるとやぶでも枯れるというところから藪枯しの名がついたが，一名ビンボウカズラともいわれる。茎は巻きひげで，他物にからまって長く伸び，若い時は紅色を帯びている。葉は互生して巻きひげと対生する位置につき，鳥足状の5小葉をもった複葉である。花は小さく，7～8月ころ，集散花序をつくって開き，花弁は4枚，緑色で開くと脱落し，淡紅色の花盤が現れる。

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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