Potamogeton filiformis f. elongatus Baagøe Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Alismatales family Potamogetonaceae genus Stuckenia species Stuckenia filiformis Name Homonyms Potamogeton filiformis f. elongatus Baagøe ex G.Fisch. Potamogeton filiformis var. elongatus (Baagøe ex G.Fisch.) G.Fisch. Potamogeton filiformis f. elongatus Baagøe