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Tectaria estremerana : ウィキペディア英語版 | Tectaria estremerana
''Tectaria estremerana'' is a rare species of fern known by the common name Puerto Rico halberd fern.〔(''Tectaria estremerana''. ) USDA Plants Profile.〕 It is endemic to Puerto Rico. It is a federally listed endangered species of the United States.〔USFWS. (Determination of Endangered Status for Four Endemic Puerto Rican Ferns. ) ''Federal Register'' June 9, 1993.〕 This fern has fronds up to 80 centimeters long, each with a hairy, orange brown stipe. The rachis is hairy and the leaf is divided into a few elongated leaflets.〔 When this plant was placed on the United States' Endangered Species List it was known from a population of 23 individuals in Arecibo, Puerto Rico. The ferns are located about 200 meters away from the Arecibo Radio Telescope.〔 Later more individuals were discovered in Río Abajo Commonwealth Forest and in the municipality of Florida.〔USFWS. (5-Year Review for 3 Puerto Rican Ferns. ) January 2010.〕 ==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「Tectaria estremerana」の詳細全文を読む
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