Cynanchum obtusifolium L. f. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Apocynaceae genus Cynanchum species Cynanchum obtusifolium Name Homonyms Cynanchum obtusifolium Rich. ex Pers., 1805 Cynanchum obtusifolium L.fil. Cynanchum obtusifolium Rich.