Physcia grisea f. pityrea (Ach.) Anon. Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Fungi phylum Ascomycota class Lecanoromycetes order Caliciales family Physciaceae genus Poeltonia species Poeltonia grisea Name Homonyms Physcia grisea var. pityrea (Ach.) Flagey, 1891 Physcia grisea f. pityrea (Ach.) Anon.