Carduus spinosus 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 spinosus Gueldenst. ex Ledeb. Carduus spinosus Gueldenst.