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Polystichum calderonense : ウィキペディア英語版 | Polystichum calderonense
''Polystichum calderonense'' is a rare species of fern known by the common name Monte Guilarte hollyfern. It is endemic to Puerto Rico, where it occurs in the Peñuelas and Guilarte Commonwealth Forests. There are only 57 individual plants remaining.〔USFWS. (''Polystichum calderonense'' Five-year Review. ) January 2010.〕 It is a federally listed endangered species of the United States. This evergreen terrestrial fern grows in mountains of volcanic origin. It is known from only two locations, one in a forest which is privately owned and another on public land that may be vulnerable to inadequate forest management practices.〔 ==References==
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「Polystichum calderonense」の詳細全文を読む
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