Usnea barbata var. xanthopoga Müll.Arg. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Fungi phylum Ascomycota class Lecanoromycetes order Lecanorales family Parmeliaceae genus Usnea species Usnea xanthopoga Name Homonyms Usnea barbata var. xanthopoga Müll.Arg.