Rumex bucephalophorus var. bucephalophorus Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Polygonaceae genus Rumex species Rumex bucephalophorus Name Homonyms Rumex bucephalophorus var. bucephalophorus Rumex bucephalophorus subsp. bucephalophorus