Parmelia pseudoshinanoana

Parmelia pseudoshinanoana is a species of corticolous (bark-dwelling) foliose lichen in the family Parmeliaceae. Described from Mount Fuji in 1951, this lichen is widespread across Japan, occurring on tree bark in temperate forests throughout Honshu and Shikoku. The species forms pale greenish- to brownish-grey rosette-shaped growths 6–12 cm across and is distinguished by its lobe edges that become densely covered with tiny upright projections and a continuous white rim of small pores—features that help separate it from the related P. shinanoana, which has simpler root-like structures and different chemistry....read more on Wikipedia.