Rheum rhaponticum Herder Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Polygonaceae genus Rheum species Rheum compactum Name Homonyms Rheum rhaponticum L. Rheum rhaponticum Delarbre Rheum rhaponticum Herder Rheum rhaponticum S.G.Gmel. Rheum rhaponticum S.G.Gmel. ex Ledeb.