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Ochroma pyramidale
''Ochroma pyramidale'', commonly known as the balsa tree, is a species of flowering plant in the mallow family, Malvaceae. It is a large, fast-growing tree that can grow up to tall. Balsa wood is a very lightweight material with many uses. Balsa trees are native to southern Brazil and Bolivia north to southern Mexico.
==Biology==
A member of the mallow family, ''O. pyramidale'' is native to southern Mexico to southern Brazil, but is now found in many other countries (Papua New Guinea, Indonesia, Thailand, Solomon Islands). It is a pioneer plant, which establishes itself in clearings in forests, either man-made or where trees have fallen, or in abandoned agricultural fields. It grows extremely rapidly, up to in 10–15 years. The speed of growth accounts for the lightness of the wood, which has a lower density than cork. Trees generally do not live beyond 30 to 40 years.
Flowers are produced from the third year onwards, typically at the end of the rainy season when few other trees are in flower. The large flowers open in the late afternoon and remain open overnight. Each may contain a pool of nectar up to deep. Daytime pollinators include capuchin monkeys. However most pollination occurs at night. It was once thought that the main pollinators were bats; however recent evidence suggests that two nocturnal arboreal mammals, the kinkajou and the olingo, may be the primary pollinators.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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