Rheum fedtschenkoi Maxim. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Polygonaceae genus Rheum species Rheum fedtschenkoi Name Homonyms Rheum fedtschenkoi Maxim. ex Regel Rheum fedtschenkoi Maxim.