Ferocactus emoryi subsp. covillei (Britton & Rose) D.R. Hunt & Dimmitt Ferocactus emoryi subsp. covillei (Britton & Rose) D.R. Hunt & Dimmitt in Cactaceae Syst. Init. 20: 16. 2005 sec. Hunt 2016≡Ferocactus covillei Britton & Rose, Cactaceae (Britton & Rose) 3: 132. 1922 syn. sec. Hunt & al. 2006