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Cetradonia
''Cetradonia'' is a lichen genus in the family Cladoniaceae. A monotypic genus, ''Cetradonia'' contains the single species ''Cetradonia linearis'' (formerly known as ''Cladonia linearis'' and as ''Gymnoderma lineare''). The genus was circumscribed in 2002.〔
''Cetradonia linearis'', commonly known as the rock gnome lichen, is a squamulose lichen found in the higher elevations of the southern Appalachians. Populations are only known to exist in Georgia, North Carolina, South Carolina and Tennessee. The lichen occurs only in frequent fog, or in deep river gorges. Because of its specialized habitat requirements and heavy collection for scientific purposes, the lichen has been listed as an endangered species since January 18, 1995. It is only one of two lichens on the endangered species list, the other being the Florida perforate cladonia.〔USFWS. (Rock Gnome Lichen. ) Asheville Field Office.〕
==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「Cetradonia」の詳細全文を読む
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