Mnium orthorhynchum subsp. nivale (Pfeff.) Giacom. Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Plantae phylum Bryophyta class Bryopsida order Bryales family Mniaceae genus Mnium species Mnium thomsonii Name Homonyms Mnium orthorhynchum subsp. nivale (Pfeff.) Giacom. Mnium orthorhynchum var. nivale Pfeff.