Closterium tumidum subsp. tumidum Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Plantae phylum Charophyta class Zygnematophyceae order Zygnematales family Closteriaceae genus Closterium species Closterium tumidum Name Homonyms Closterium tumidum subsp. tumidum Closterium tumidum f. tumidum