Melocactus melocactoides f. sanctaritii Rizzini Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Melocactus species Melocactus violaceus Name Homonyms Melocactus melocactoides f. sanctaritii Rizzini