Piptoporus betulinus (Bull.) P.Karst., 1881 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Fungi phylum Basidiomycota class Agaricomycetes order Polyporales family Fomitopsidaceae genus Fomitopsis species Fomitopsis betulina Name Homonyms Piptoporus betulinus (Bull.) P.Karst.