Panama rubber tree (English name) Castilloa elastica Cerv.

Japanese: パナマゴムノキ（英語表記）Castilloa elastica Cerv.

An evergreen tall tree of the Mulberry family. It was once used to collect rubber, but is rarely used now. It is also called the Mexican rubber tree or the American rubber tree. Its English names include Castilloa rubber tree, Central American rubber tree, Panama rubber tree, and Mexican rubber tree. It grows to a height of 20 to 30 meters, with alternate leaves on soft, hairy branches. The leaves have short petioles, are oblong, and are 20 to 40 cm long.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

クワ科の常緑高木。かつてはゴムの採集樹として利用されたが，現在はほとんど用いられない。メキシコゴムノキ，アメリカゴムノキとも呼ばれる。英名はCastilloa rubber tree,Central American rubber tree,Panama rubber tree,Mexican rubber treeなど。高さ20～30mになり，軟毛がはえる枝に葉を互生させる。葉は短い葉柄があり長楕円形，長さ20～40cm。

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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