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