lecanora muralis, protoparmeliopsis muralis, is a waxy looking, pale yellowish green crustose lichen. berlin, germany

path gray grey apothecia fungi detail biology fungus rock flora rosette wild lichens symbiotic organisms muralis waxy looking pale yellowish green crustose lichen grows rosettes radiating center filled disc-like yellowish-tan fruiting bodies berlin germany stone pattern surface white nature grunge nobody dirty natural rough outdoor textured dark lecanora protoparmeliopsis usually from