Vincetoxicum gonocarpos (Michaux) Britton Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Apocynaceae genus Cynanchum species Cynanchum laeve Name Homonyms Vincetoxicum gonocarpos Walter Vincetoxicum gonocarpos (Michaux) Britton