Mammillaria hexacentra (O.Berg) Otto Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Mammillaria species Mammillaria longimamma Name Homonyms Mammillaria hexacentra (O.Berg) Otto Mammillaria hexacentra (O.Berg) Otto ex C.F.Först.