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