Hoya obscura Elmer Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Apocynaceae genus Hoya species Hoya obscura Name Homonyms Hoya obscura Elmer ex Merr. Hoya obscura Elmer ex C.M.Burton Hoya obscura Elmer