Guignardia salicis (Fuckel) Syd. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Fungi phylum Ascomycota class Sordariomycetes order Diaporthales family Valsaceae genus Cytospora species Cytospora fertilis Name Homonyms Guignardia salicis (Fuckel) Syd. ex Kirschst. Guignardia salicis (Fuckel) Syd.