Dioscorea japonica hort. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Dioscoreales family Dioscoreaceae genus Dioscorea species Dioscorea japonica Name Homonyms Dioscorea japonica Thunb. Dioscorea japonica hort. ex Loudon Dioscorea japonica Herb.Madr. ex Wall. Dioscorea japonica hort. Dioscorea japonica Herb.Madr.