Pertusaria stellata

Pertusaria stellata is a species of saxicolous (rock-dwelling) crustose lichen in the family Pertusariaceae. Described in 2008 from specimens collected on Auckland Island and in southern Chile, this species is distinguished by its creamy white to pale grey crust and distinctive blood-red, star-shaped structures (cephalodia) embedded in its surface. It is closely related to Pertusaria macloviana but differs in having larger spore-producing structures, longer spores, and the presence of these characteristic red cephalodia. The species is known only from subantarctic islands south of New Zealand and a locality in southern Chile, where it grows on siliceous rocks in cool, oceanic conditions....read more on Wikipedia.