Rhizocarpon betulinum Hepp Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Fungi phylum Ascomycota class Lecanoromycetes order Caliciales family Caliciaceae genus Buellia species Buellia griseovirens Name Homonyms Rhizocarpon betulinum Hepp ex Zwackh Rhizocarpon betulinum Hepp