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''Cyathea crassa'' is a species of tree fern endemic to the Santo Domingo area in the Dominican Republic. Little is known about this rare tree fern. ''C. crassa'' is part of the ''Cyathea woodwardioides'' complex from the Greater Antilles together with five other species: ''Cyathea fulgens'', ''Cyathea grevilleana'', ''Cyathea portoricensis'', and ''Cyathea tussacii''. This species is not conspecific with ''Alsophila crassa'' (Karsten, 1869), which is based on material collected from wet, cold, montane forest at Mérida by Franz Engel in 1859. There are no modern collections that match Karsten's description and so the identity of this species remains unclear. The naming of ''C. crassa'' represents some taxonomic problems. If the genus ''Alsophila'' is recognised, the specific epithet ''crassa'' is unavailable for this tree fern, having been used by Karsten. To avoid confusion, David Conant renamed it ''Alsophila jimeneziana'' in 1983. ==References== *Braggins, John E. & Large, Mark F. 2004. ''Tree Ferns''. Timber Press, Inc., p. 117. ISBN 0-88192-630-2 *(The International Plant Names Index: ''Cyathea crassa'' ) 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 crassa」の詳細全文を読む スポンサード リンク
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