Echinocactus agglomeratus Karw. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Ferocactus species Ferocactus robustus Name Homonyms Echinocactus agglomeratus Karw. Echinocactus agglomeratus Karw. ex Pfeiff.