Xanthidium smithii var. maius (Ralfs) W. & G.S.West Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Xanthidium species Xanthidium smithii Name Synonyms Xanthidium octocorne var. maius Ralfs, 1848 Homonyms Xanthidium smithii var. maius (Ralfs) W. & G.S.West