Cereus nigricans Pfeiff. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Pilosocereus species Pilosocereus polygonus Name Homonyms Cereus nigricans Pfeiff. Cereus nigricans Lem. Cereus nigricans J.Forbes