A deciduous shrub of the Urticaceae family that is widely distributed in the subtropics of East Asia, it grows quickly and invades logged areas as a pioneer tree. It grows to a height of 2-3m and branches out well, with a shape similar to that of a young willow. The leaves are also similar to those of willows, being slender at 10-15cm long and 1-3cm wide. The undersides of the leaves are covered with white spider hairs. It is dioecious, with the female flowers clustered in a globular shape. The inflorescence of the male flowers is a well-branched cyme. The flowers bloom around April, and the fruit ripens in May and June. During the fruiting season, the fused perianth of the female flowers becomes juicy and turns yellow. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
東アジアの亜熱帯域に広く分布するイラクサ科の落葉性低木で,生長が速く伐採跡地などに先駆樹種として侵入する。高さ2~3mでよく枝を分かち,樹形はヤナギの若木に似ている。葉もヤナギに似て細長く長さ10~15cm,幅1~3cm。葉裏は白いくも毛におおわれる。雌雄異株で,雌花は球状に集まってつく。雄花の花序はよく枝分れした集散花序。花は4月ころ咲き,5~6月には果実が熟す。果期には合着した雌花の花被が多汁質となり,黄色に色づく。
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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