Calliergon giganteum f. robustum (Warnst.) C.E.O.Jensen Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Bryophyta class Bryopsida order Hypnales family Calliergonaceae genus Calliergon species Calliergon giganteum Name Homonyms Calliergon giganteum var. robustum Warnst. Calliergon giganteum f. robustum (Warnst.) C.E.O.Jensen