About Edrudia constipans (Nyl.) W.P.Jord.
Edrudia is a fungal genus that belongs to the family Lecanoraceae. This genus is monotypic, meaning it contains only one single species: Edrudia constipans, which is a lichen that is endemic to the Farallon Islands of California. The genus Edrudia is named in honor of Emanuel David Rudolph, an American botanist and lichenologist.