Cynanchum cheiranthoides Dombey Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Apocynaceae genus Tweedia species Tweedia birostrata Name Homonyms Cynanchum cheiranthoides Dombey ex Decne. Cynanchum cheiranthoides Dombey