Endocarpon arboreum Schwein. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Fungi phylum Ascomycota class Eurotiomycetes order Verrucariales family Verrucariaceae genus Placidium species Placidium arboreum Name Homonyms Endocarpon arboreum Schwein. Endocarpon arboreum Schwein. ex E.Michener