Bryum papillosum Arnell Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Bryophyta class Bryopsida order Bryales family Bryaceae genus Ptychostomum species Ptychostomum pallens Name Homonyms Bryum papillosum Dicks. Bryum papillosum Müll.Hal. Bryum papillosum Arnell Bryum papillosum Arnell ex G.Roth