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Agathis orbicula : ウィキペディア英語版 | Agathis orbicula
''Agathis orbicula'' (Sarawak kauri) is a coniferous tree native to the island of Borneo — in Brunei, Kalimantan-Indonesia, and Sabah-Malaysia. It is found scattered throughout tropical rainforests and Kerangas forests. It is commonly found on hills and plateaus. The species is facing a high risk of extinction due to its scattered distribution and the decline in quality of its habitat. ==Description== Agathis orbicula is a medium-sized tree of up to . Like all ''Agathis'', Sarawak Kauri is generally possessed of a large, straight trunk. The trunk is usually branchless until close to the top where branches are retained which form a globular crown. The leaves range in shape from ovangular to circular, and are glacous on their underside. The leaves are roughly two by three centimetres; juvenile leaves are much larger by comparison and are roughly twice the size of adult leaves. It can be inferred that the tree is similar in its appearance to other large trees of the genus, particularly Agathis borneensis. This is because it is likely ''A. orbicula'' was mistaken for ''A. Borneensis''.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Agathis orbicula」の詳細全文を読む
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