Cirsium acaulon f. caulescens Rchb. Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Asterales family Asteraceae genus Cirsium species Cirsium acaulon Name Homonyms Cirsium acaulon var. caulescens Cariot & St.-Lag., 1889 Cirsium acaulon f. caulescens Rchb. Cirsium acaulon var. caulescens (Pers.) Bluff & Fingerh. Cirsium acaulon f. caulescens (W.D.J.Koch & Ziz) Lindm.