Rumex cordifolius Hornem. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Polygonaceae genus Rumex species Rumex aquaticus Name Homonyms Rumex ×cordifolius Brügger Rumex cordifolius Hornem. ex Rchb. Rumex cordifolius Hornem. ex Campd. Rumex cordifolius Hornem.