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''Cyathea brooksii'' is a species of tree fern native to Cuba, Hispaniola and Puerto Rico, where it grows on serpentine soils in shaded ravines, along streams, and on forested slopese at an altitude of 250-950 m. The trunk is prostrate and only about 6 cm in diameter. Fronds are pinnate or bipinnate and up to 2 m long. The base of the rachis is covered with blackish scales that have a paler margin. Sori occur in two rows, one along each side of the pinnule midvein. In the wild, ''C. brooksii'' is known to hybridise with ''Cyathea fulgens'' and ''Cyathea portoricensis'', although the resulting plants are thought to be sterile. This taxon is not to be confused with ''Cyathea brooksii'' (Copeland, 1911), which is a synonym of ''Cyathea squamulata''. ==References== *Braggins, John E. & Large, Mark F. 2004. ''Tree Ferns''. Timber Press, Inc., p. 106. ISBN 0-88192-630-2 *(The International Plant Names Index: ''Cyathea brooksii'' ) 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「Cyathea brooksii」の詳細全文を読む スポンサード リンク
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