Staurastrum polymorphum Brébisson Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Charophyta class Zygnematophyceae order Zygnematales family Desmidiaceae genus Staurastrum species Staurastrum polymorphum Name Homonyms Staurastrum polymorphum Brébisson Staurastrum polymorphum Bréb. ex Ralfs