Cynanchum nanum Buch.-Ham. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Apocynaceae genus Vincetoxicum species Vincetoxicum nanum Name Homonyms Cynanchum nanum Skottsb. Cynanchum nanum Buch.-Ham. ex Wight Cynanchum nanum Buch.-Ham.