Echinocactus gracilis hort. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Echinocactus species Echinocactus gracilis Name Homonyms Echinocactus gracilis hort. ex C.F.Först., 1846 Echinocactus gracilis Lem. Echinocactus gracilis hort.