Echinocactus pachycentrus Lehm. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Tracheophyta class Magnoliopsida order Caryophyllales family Cactaceae genus Gymnocalycium species Gymnocalycium mostii Name Homonyms Echinocactus pachycentrus Lehm. ex Pfeiff. Echinocactus pachycentrus Lehm.