Echinocactus ambiguus Hildm. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Copiapoa species Copiapoa cinerascens Name Homonyms Echinocactus ambiguus Hildm. ex K.Schum. Echinocactus ambiguus Hildm.