Xanthium spinosum f. spinosum Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Xanthium species Xanthium spinosum Name Homonyms Xanthium spinosum f. spinosum Xanthium spinosum var. spinosum Xanthium spinosum subsp. spinosum