Oxygonum denhardtii DeWild. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Polygonaceae genus Oxygonum species Oxygonum atriplicifolium Name Homonyms Oxygonum denhardtii De Wild. Oxygonum denhardtii DeWild.