Spondylosium planum var. triquetrum Grönblad, 1926 Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Spondylosium species Spondylosium planum Name Homonyms Spondylosium planum var. triquetrum Grönblad, 1926