Ageratum conyzoides subsp. mexicanum (Sims) DC. Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Ageratum species Ageratum houstonianum Name Homonyms Ageratum conyzoides var. mexicanum (Sims) DC. Ageratum conyzoides subsp. mexicanum (Sims) DC.