Dioscorea cummingii var. polyphylla (R.Knuth) Burkill Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Liliopsida order Dioscoreales family Dioscoreaceae genus Dioscorea species Dioscorea cumingii Name Homonyms Dioscorea cummingii var. polyphylla (R.Knuth) Burkill