Agaricus spongiosus Berk. & Broome Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Fungi phylum Basidiomycota class Agaricomycetes order Agaricales family Omphalotaceae genus Rhodocollybia species Rhodocollybia butyracea Name Homonyms Agaricus spongiosus Fr. Agaricus spongiosus Schumach. Agaricus spongiosus With.