Cirsium iowense var. crattyii Pammel Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Cirsium species Cirsium altissimum Name Homonyms Cirsium iowense var. crattyii Pammel Cirsium iowense var. crattyii Pammel ex Wolden