Opuntia mesacantha var. sphaerocarpa J.M.Coult. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Opuntia species Opuntia phaeacantha Name Homonyms Opuntia mesacantha var. sphaerocarpa J.M.Coult. ex Wooton & Standl. Opuntia mesacantha var. sphaerocarpa J.M.Coult.