Potamogeton obtusus f. alpinus (Balb.) Gaudin Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Alismatales family Potamogetonaceae genus Potamogeton species Potamogeton alpinus Name Homonyms Potamogeton obtusus var. alpinus (Balb.) Gaudin