Staurastrum cuspidatum var. canadense G.M.Smith, 1921 Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Staurodesmus species Staurodesmus cuspidicurvatus Name Homonyms Staurastrum cuspidatum var. canadense G.M.Smith, 1921