Ferocactus wislizeni subsp. ajoensis Fencl & Kalas in Bradleya 31: 7. 2013 Ferocactus wislizeni subsp. ajoensis Fencl & Kalas in Bradleya 31: 7. 2013Taxon for this nameFerocactus wislizeni subsp. ajoensis Fencl & Kalas