Rhizocarpon geographicum f. geographicum Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Fungi phylum Ascomycota class Lecanoromycetes order Rhizocarpales family Rhizocarpaceae genus Rhizocarpon species Rhizocarpon geographicum Name Homonyms Rhizocarpon geographicum subsp. geographicum Rhizocarpon geographicum f. geographicum