Potamogeton gramineus f. gramineus Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Alismatales family Potamogetonaceae genus Potamogeton species Potamogeton gramineus Name Homonyms Potamogeton gramineus f. gramineus Potamogeton gramineus var. gramineus