Parmelia shinanoana

Parmelia shinanoana is a species of saxicolous (rock-dwelling) foliose lichen in the family Parmeliaceae. Originally described from the Yatsugatake Mountains in Japan in 1927, this lichen has since been found across East Asia, from Japan and Korea through the Russian Far East into Siberia, where it reaches the northwestern edge of its range in the Transbaikal region. The species forms pale greenish to brownish-grey rosettes-shaped growths up to 20 cm across on siliceous rocks and is distinguished by a conspicuous white band of small pores around each lobe margin, as well as by its unusual chemistry that includes gyrophoric acid in the outer layer, a rare feature among related species....read more on Wikipedia.