Xanthium wootonii Cockerell ex DeVries Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Xanthium species Xanthium strumarium Name Homonyms Xanthium wootonii Cockerell Xanthium wootonii Cockerell ex de Vries Xanthium wootonii Cockerell ex DeVries