Mammillaria exudans Zucc. ex Pfeiff. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Coryphantha species Coryphantha ottonis Name Homonyms Mammillaria exudans Zucc. ex Pfeiff. Mammillaria exudans Zucc.