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Pandanus
''Pandanus'' is a genus of monocots with some 750 accepted species.〔(【引用サイトリンク】title=Search results — The Plant List )〕 They are palm-like, dioecious trees and shrubs native to the Old World tropics and subtropics. Common names include pandan〔(【引用サイトリンク】title=Australian Plant Names Index )〕 (), screw palm,〔 and screw pine.〔 They are classified in the order Pandanales, family Pandanaceae.
==Description==
Often called pandanus palms, these plants are not closely related to palm trees. The species vary in size from small shrubs less than tall, to medium-sized trees tall, typically with a broad canopy, heavy fruit, and moderate growth rate. The trunk is stout, wide-branching, and ringed with many leaf scars. They commonly have many thick prop roots near the base, which provide support as the tree grows top-heavy with leaves, fruit, and branches. These roots are adventitious and often branched. The top of the plant has one or more crowns of strap-shaped leaves that may be spiny,〔〔 varying between species from to or longer, and from up to broad.
They are dioecious, with male and female flowers produced on different plants. The flowers of the male tree are long and fragrant, surrounded by narrow, white bracts. The female tree produces flowers with round fruits that are also bract-surrounded. The individual fruit is a drupe, and these merge to varying degrees forming a multiple fruit, a globose structure, in diameter, and have many prism-like sections, resembling the fruit of the pineapple. Typically, the fruit changes from green to bright orange or red as it matures. ''Pandanus'' fruit are eaten by animals including bats, rats, crabs, elephants and monitor lizards, but the vast majority of species are dispersed primarily by water.
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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