Agaricus bisporus var. avellaneus J.E.Lange Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Fungi phylum Basidiomycota class Agaricomycetes order Agaricales family Agaricaceae genus Agaricus species Agaricus bisporus Name Homonyms Agaricus bisporus var. avellaneus J.E.Lange ex Singer, 1961 Agaricus bisporus var. avellaneus J.E.Lange Agaricus bisporus subsp. avellaneus (J.E.Lange) Singer, 1961