A deciduous tree of the Anacardiaceae family that grows wild in the mountains and fields of Japan, reaching a height of 5-10 m (illustration). The leaves turn beautiful red in autumn. The twigs, petioles, and inflorescences are densely covered with brown down. The leaves are alternate, odd-pinnate, compound, 25-40 cm long, and the rachis and petioles are usually winged. There are 7-13 papery leaflets, 5-12 cm long, ovate, elliptical, or oblong, with coarse sawtooth edges, and densely covered with gray-brown down on the underside. In summer, panicles 15-25 cm long are produced at the tips of the branches, and many small white flowers grow on them. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
日本各地の山野に自生する高さ5~10mのウルシ科の落葉小高木(イラスト)。秋の紅葉が美しい。小枝,葉柄,花序に褐色の柔毛を密生する。葉は互生し,奇数羽状複葉で,長さは25~40cm,羽軸と葉柄には通常,翼がある。紙質の小葉は7~13枚で,長さ5~12cm,卵形,楕円形,または長楕円形で,ふちにあらい鋸歯があり,裏面に灰褐色の柔毛を密生する。夏,枝の先端に長さ15~25cmの円錐花序をつけ,小さい白色の花を多数つける。
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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