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Thelypteris yaucoensis : ウィキペディア英語版 | Thelypteris yaucoensis
''Thelypteris yaucoensis'' is a rare species of fern known by the common name Puerto Rico maiden fern.〔(''Thelypteris yaucoensis''. ) USDA Plants Profile.〕 It is endemic to Puerto Rico, where it is known from only three localities. It is a federally listed endangered species of the United States. This fern was placed on the endangered species list in 1993. At that time it was known to exist at three locations: two in Yauco and one in Ciales in Puerto Rico. There are a total of about 65 plants known at all three combined.〔USFWS. (Determination of endangered status for three endemic Puerto Rican ferns. ) ''Federal Register'' July 2, 1993.〕 This terrestrial fern has fronds up to 52 centimeters long with the blades divided into 13 to 15 pairs of segments.〔 ==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「Thelypteris yaucoensis」の詳細全文を読む
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