Echinocereus rigidissimus (Engelm.) F. Haage subsp. rigidissimus, Special Offer (catálogo): 13. 1897 sec. Hunt 2016
- =Echinocereus pectinatus var. rigidissimus (Engelm.) Engelm. ex Rümpler, Handb. Cacteenk. (ed. 2): 818. 1886 syn. sec. Guzmán & al. 2003