Alexander William Evans

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Cladonia perforata is a rare species of lichen known as Florida perforate cladonia and Florida perforate reindeer lichen. It is endemic to the state of Florida in the United States, where it is known from 16 populations in four widely separated areas of the state. It is native to a very specific type of Florida scrub habitat which is increasingly rare and patchy due to habitat destruction, degradation, and fragmentation. In 1993 this was the first species of lichen to be federally listed as an endangered species of the United States.

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Cladonia atlantica, also known as the Atlantic cup lichen, is a species of lichen in the family Cladoniaceae. It is found among the Atlantic Coast of the US, ranging from South Carolina to the Northeastern United States.

Cladonia prostrata, commonly called dune cup lichen or resurrection lichen, is an endangered species of lichen endemic to the U.S. southeast coastal plain where it is known from populations in Florida, Georgia, and Alabama.

Cladonia alaskana, commonly known as the Alaskan cup lichen, is a species of cup lichen in the Cladoniaceae family. It is found in and around the arctic circle, growing in acidic soils. 40-80 mm tall and up to 2 mm in diameter. This species grows over boulders in heath and tussock tundras.

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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 by Jiang-Chun Wei and Teuvo Ahti. The genus was once placed in the family Cetradoniaceae (created in 2002) until that family was subsumed into the Cladoniaceae in 2006. Cetradonia linearis, commonly known as the rock gnome lichen, is a squamulose lichen found in the higher elevations of the southern Appalachian Mountains. Populations are only known to exist in