Rumex angustifolius Engelm. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Polygonaceae genus Rumex species Rumex sibiricus Name Homonyms Rumex angustifolius Campd. Rumex angustifolius Engelm. ex Meisn. Rumex angustifolius Engelm.