Cereus paxtonianus Monv. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Praecereus species Praecereus saxicola Name Homonyms Cereus paxtonianus Monv. ex Salm-Dyck Cereus paxtonianus Monv.