Elodea densa subsp. longifolia Bonstedt Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Alismatales family Hydrocharitaceae genus Elodea species Elodea densa Name Homonyms Elodea densa var. longifolia Bonstedt Elodea densa subsp. longifolia Bonstedt