| 词条 | Thelypteris yaucoensis |
| 释义 |
|image = Thelypteris yaucoensis.jpg |status = LE |status_system = ESA | regnum = Plantae | divisio = Polypodiophyta | classis = Polypodiopsida | ordo = Blechnales | familia = Thelypteridaceae | genus = Thelypteris | species = T. yaucoensis | binomial = Thelypteris yaucoensis | binomial_authority = Proctor | synonyms = }} Thelypteris yaucoensis is a rare species of fern known by the common name Puerto Rico maiden fern.[1] 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.[2] This terrestrial fern has fronds up to 52 centimeters long with the blades divided into 13 to 15 pairs of segments.[2] References1. ^Thelypteris yaucoensis. USDA Plants Profile. {{Taxonbar|from=Q7781157}}2. ^1 USFWS. Determination of endangered status for three endemic Puerto Rican ferns. Federal Register July 2, 1993. 4 : Thelypteris|Pteridophyta of the Americas|Endemic flora of Puerto Rico|Plants described in 1989 |
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