Potamogeton serotinus W.D.J.Koch, 1844 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Alismatales family Potamogetonaceae genus Groenlandia species Groenlandia densa Name Homonyms Potamogeton serotinus Schrad. ex Schult. & Schult.f. Potamogeton serotinus W.D.J.Koch, 1844 Potamogeton serotinus Schrad.