map lichen rhizocarpon geographicum species background. lichen growing on quartzite rock

abstract aged algae backdrop background biology black closeup color crust crustose detail ecology environment europe fejkl flora fungi fungus geographicum granite green grey jiri lichen macro map mapovnik mineral moss mountain mountains natural nature nobody norway old organism outdoors pattern plant rhizocarpon rock rough stone surface symbiotic texture textured weathered zemepisny