Crossidium griseum var. pottioideum (De Not.) Mönk. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Bryophyta class Bryopsida order Pottiales family Pottiaceae genus Crossidium species Crossidium squamiferum Name Homonyms Crossidium griseum var. pottioideum (De Not.) Mönk.