Carduus litigiosus var. litigiosus Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Carduus species Carduus litigiosus Name Homonyms Carduus litigiosus subsp. litigiosus Carduus litigiosus var. litigiosus