Melocactus depressus Haw. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Melocactus species Melocactus violaceus Name Homonyms Melocactus depressus Salm-Dyck ex DC. Melocactus depressus (Aiton) Hook. Melocactus depressus Salm-Dyck Melocactus depressus Haw.