Carduus spinosissimus Gueldenst. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Cirsium species Cirsium acaule Name Homonyms Carduus spinosissimus Walter Carduus spinosissimus Gerbi Carduus spinosissimus Steud. Carduus spinosissimus (L.) Vill. Carduus spinosissimus Gueldenst. ex Ledeb. Carduus spinosissimus C.A.Mey. Carduus spinosissimus Gueldenst.