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Aganisia cyanea
''Aganisia cyanea'' (formerly ''Acacallis cyanea'') is a showy species of orchid native to Colombia, Venezuela, Peru and Brazil and widely cultivated elsewhere as an ornamental.〔(id=4384|Kew World Checklist of Selected Plant Families )〕 It is remarkable because some cultivars of this species produce blue flowers, the color blue being quite rare among the orchids. They are considered difficult to maintain in cultivation without a controlled growing environment.〔''Illustrated Encyclopedia of Orchids'' ISBN 0-88192-267-6〕
== Biology ==
''Aganisia cyanea'' is found in very wet, lowland rain forests in northern South America growing on lower sections of the trunks of large trees. The plants can be submerged under water during monsoons for several weeks due to flooding in habitat with no apparent harm.〔〔''The Orchids, Natural History and Classification'', Robert L. Dressler. ISBN 0-674-87526-5〕
The plants grow from a creeping rhizome with inter-spaced pseudobulbs with one apical, usually pleated leaf. These plants bloom from the base of the pseudobulbs, and produce a raceme of up to 10 flowers.
The flowers of these plants have a metallic, almost surreal appearance and appear to be made of bluish metal. This is very striking. The flowers take on a more bluish cast when not exposed to direct sunlight.〔〔
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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