Cereus monacanthus Cels Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Harrisia species Harrisia martinii Name Homonyms Cereus monacanthus Lem. Cereus monacanthus Cels ex K.Schum. Cereus monacanthus Cels