Collema nigrescens var. furfuraceum Schaer. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Fungi phylum Ascomycota class Lecanoromycetes order Peltigerales family Collemataceae genus Collema species Collema furfuraceum Name Homonyms Collema nigrescens var. furfuraceum Schaer. Collema nigrescens f. furfuraceum Schaer.