Lactarius rufus f. exumbonatus (Boud.) Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Fungi phylum Basidiomycota class Agaricomycetes order Russulales family Russulaceae genus Lactarius species Lactarius rufus Name Homonyms Lactarius rufus var. exumbonatus Boud. Lactarius rufus f. exumbonatus (Boud.)