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