Penium cylindrus (Ehrenberg) Brebisson Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Charophyta class Zygnematophyceae order Zygnematales family Peniaceae genus Penium species Penium cylindrus Name Homonyms Penium cylindrus (Ehrenberg) Brebisson Penium cylindrus Bréb. ex Ralfs