Drepanocladus exannulatus var. robustus G.Roth & Bock Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Bryophyta class Bryopsida order Hypnales family Calliergonaceae genus Sarmentypnum species Sarmentypnum tundrae Name Homonyms Drepanocladus exannulatus var. robustus G.Roth & Bock