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