Barbula nipponica subsp. gracilis Nog. Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Plantae phylum Bryophyta class Bryopsida order Pottiales family Pottiaceae genus Didymodon species Didymodon constrictus Name Homonyms Barbula nipponica var. gracilis Nog. Barbula nipponica subsp. gracilis Nog.