Persicaria amphibium f. fluitans (Eaton) Fernald Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Polygonaceae genus Persicaria species Persicaria amphibia Name Homonyms Persicaria amphibium f. fluitans (Eaton) Fernald