Xyloma umbonatum Hoppe Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Fungi phylum Ascomycota class Leotiomycetes order Rhytismatales family Rhytismataceae genus Rhytisma species Rhytisma umbonatum Name Homonyms Xyloma umbonatum Hoppe ex Wallr. Xyloma umbonatum Hoppe