Cynanchum wilfordii subsp. amamianum Hatus. Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Apocynaceae genus Cynanchum species Cynanchum boudieri Name Homonyms Cynanchum wilfordii var. amamianum Hatus. Cynanchum wilfordii subsp. amamianum Hatus.