A tree of the genus Dipterocarpus in the family Dipterocarpaceae (illustration). There are about 75 species in Southeast Asia, from India and Sri Lanka to the Philippines, and they are common in the tropical rainforests of Borneo, Sumatra, the Malay Peninsula, and Mindanao. Most are evergreen, reach a height of 50 to 60 meters and a diameter of 1 to 2 meters, have straight, cylindrical trunks, and are tall below the branches. However, several species from Myanmar to Indochina are deciduous in the dry season and are short in height. Buttress roots are not well developed. The twigs are thick and the stipule scars are clear. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
フタバガキ科フタバガキ属Dipterocarpusの樹木(イラスト)。インド,スリランカからフィリピンにいたる東南アジアに約75種あり,ボルネオ,スマトラ,マレー半島およびミンダナオの熱帯降雨林に多い。ほとんどが常緑で,樹高50~60m,直径1~2mに達し,樹幹は通直,円筒状で,枝下が高い。ただしミャンマー~インドシナの数種は乾季に落葉し,樹高も低い。板根(ばんこん)はあまり発達しない。小枝が太く,托葉痕が明りょう。
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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