Tephrocactus polyacanthus Lem. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Maihueniopsis species Maihueniopsis darwinii Name Homonyms Tephrocactus polyacanthus Lem. ex C.F.Först. Tephrocactus polyacanthus Lem.