Potamogeton longifolius J.Gay Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Alismatales family Potamogetonaceae genus Potamogeton species Potamogeton lucens Name Homonyms Potamogeton ×longifolius Bab. Potamogeton longifolius J.Gay ex Poir. Potamogeton longifolius J.Gay