Opuntia calacantha Otto Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Opuntia species Opuntia polyacantha Name Homonyms Opuntia calacantha Forbes ex W.H.Baxter Opuntia calacantha Otto ex J.Forbes Opuntia calacantha Otto