Orthotrichum callistomum Fisch.-Oost. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Bryophyta class Bryopsida order Orthotrichales family Orthotrichaceae genus Orthotrichum species Orthotrichum callistomum Name Homonyms Orthotrichum callistomum Fisch.-Oost. ex Bruch & Schimp. Orthotrichum callistomum Fisch.-Oost. Orthotrichum callistomum Fleisch., 1850