Cylindropuntia acanthocarpa (Engelm. & Bigelow) F.M. Knuth Cylindropuntia acanthocarpa (Engelm. & Bigelow) F.M. Knuth, Kaktus-ABC: 124. 1936 sec. Hunt 2016≡Opuntia acanthocarpa Engelm. & Bigelow in Proc. Amer. Acad. Arts 3: 308. 1856 syn. sec. Guzmán & al. 2003