Xanthoparmelia evernica is a species of saxicolous (rock-dwelling), foliose lichen in the family Parmeliaceae. Found in South Africa, it was formally described as a new species in 1986 by the American lichenologist Mason Hale. The type specimen was collected from Laguneberg Mountain (district Omaruru, Namibia. The lichen has a somewhat dark yellow-green thallus measuring broad, comprising more or less linear that are 0.3âÂÂ1 mm wide. The large, hollow, spherical isidia are a characteristic feature of this lichen. It contains evernic acid and usnic acid, and trace amounts of lecanoric acid.