Closterium tumidum f. minus K.M.Strøm, 1926 Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Charophyta class Zygnematophyceae order Zygnematales family Closteriaceae genus Closterium species Closterium tumidum Name Homonyms Closterium tumidum f. minus K.M.Strøm, 1926