Rumex cristatus Wall. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Polygonaceae genus Rumex species Rumex obtusifolius Name Homonyms Rumex cristatus DC. Rumex cristatus Wall. Rumex cristatus hort. ex Schult.f., 1830 Rumex cristatus Fr. Rumex cristatus hort.