Melocactus pachyanthus Buining ex Brederoo Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Melocactus species Melocactus pachyacanthus Name Homonyms Melocactus pachyanthus Buining Melocactus pachyanthus Buining ex Brederoo