Potamogeton varians Morong Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Alismatales family Potamogetonaceae genus Potamogeton species Potamogeton spathuliformis Name Homonyms Potamogeton varians Morong Potamogeton varians Morong ex Fryer