Punctelia eganii

Punctelia eganii is a rare species of foliose lichen in the family Parmeliaceae. It was described in 2011 from a single population found in a beech-magnolia forest along the Alabama River and was named in honor of American lichenologist Robert S. Egan. The lichen appears very similar to the common species Punctelia rudecta, but can be distinguished by tiny white pores that glow bright yellow under ultraviolet light due to the chemical compound lichexanthone, otherwise unknown to occur in the genus. It is known only from its original discovery site in coastal Alabama, where habitat destruction from agriculture and development may have reduced its range. ...read more on Wikipedia.