Cylindropuntia (Engelm.) F.M. Knuth Cylindropuntia (Engelm.) F.M. Knuth, Nye kaktusbog: 102. 1930 sec. Hunt & al. 2006≡Opuntia subg. Cylindropuntia Engelm. in Proc. Amer. Acad. Arts 3: 46. 1856 syn. sec. Hunt & al. 2006