Asclepias emoryi (Greene) Vail ex Small Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Gentianales family Apocynaceae genus Asclepias species Asclepias emoryi Name Homonyms Asclepias emoryi (Greene) Vail Asclepias emoryi (Greene) Vail ex Small Asclepias emoryi (Greene) Tidestr.