Ambrosia artemisiaefolia f. villosa Fernald & Griscom Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Ambrosia species Ambrosia polystachya Name Homonyms Ambrosia artemisiaefolia f. villosa Fernald & Griscom