Mammillaria pfeifferi J.R.Booth ex Scheidw. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Mammillaria species Mammillaria rhodantha Name Homonyms Mammillaria pfeifferi J.R.Booth ex Scheidw. Mammillaria pfeifferi Booth Mammillaria pfeifferi Booth ex Bosse