Oligotrichum cavifolium (Wilson) Arnell Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Bryophyta class Polytrichopsida order Polytrichales family Polytrichaceae genus Psilopilum species Psilopilum cavifolium Name Homonyms Oligotrichum cavifolium (Wilson) Arnold Oligotrichum cavifolium (Wilson) Arnell