Mammillaria caespitosa Pfeiff. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Mammillaria species Mammillaria elongata Name Homonyms Mammillaria caespitosa Pfeiff. Mammillaria caespitosa (Engelm.) A.Gray Mammillaria caespitosa Salm-Dyck ex J.Forbes Mammillaria caespitosa Salm-Dyck