Opuntia ×occidentalis var. covillei (Britton & Rose) Parish, Man. Fl. Pl. Calif.: 657. 1925 Opuntia ×occidentalis var. covillei (Britton & Rose) Parish, Man. Fl. Pl. Calif.: 657. 1925Taxon for this nameOpuntia ×occidentalis var. covillei (Britton & Rose) Parish