Dioscorea polyclados var. oblongifolia Uline Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Dioscoreales family Dioscoreaceae genus Dioscorea species Dioscorea polyclados Name Homonyms Dioscorea polyclados var. oblongifolia Uline ex R.Knuth Dioscorea polyclados var. oblongifolia Uline