Polygonum fagopyrum Buch.-Ham. ex D.Don Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Polygonaceae genus Fagopyrum species Fagopyrum cymosum Name Homonyms Polygonum fagopyrum L. Polygonum fagopyrum Buch.-Ham. ex D.Don Polygonum fagopyrum Buch.-Ham.