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