Ambrosia artemisiaefolia var. elatior (L.) Descourt. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Ambrosia species Ambrosia artemisiifolia Name Homonyms Ambrosia artemisiaefolia var. elatior (L.) Descourt.