Potamogeton purpurascens Seidl, 1819 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Alismatales family Potamogetonaceae genus Potamogeton species Potamogeton alpinus Name Homonyms Potamogeton purpurascens Seidl ex J.Presl & C.Presl Potamogeton purpurascens Seidl, 1819