Vincetoxicum nigrescens Jord. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Apocynaceae genus Vincetoxicum species Vincetoxicum nigrum Name Homonyms Vincetoxicum nigrescens Standl. Vincetoxicum nigrescens Jord. ex Nyman Vincetoxicum nigrescens Jord.