Staurastrum forficulatum var. verrucosum R.L.Grönblad, 1920 Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Staurastrum species Staurastrum forficulatum Name Homonyms Staurastrum forficulatum var. verrucosum R.L.Grönblad, 1920