Krainzia Backeberg, Blatter fur Kakteenforschung (6): [22], 1938

Krainzia guelzowiana (Werdermann) Backeberg, Cact. & Succ. Journ. Amer. 23. 152, 1951

Krainzia guelzowiana v. comocephala Y. Ito, The Cactaceae: 564, without type, 1981

Krainzia guelzowiana v. robustior  

Krainzia guelzowiana v. splendens  

Krainzia longiflora (Britton & Rose) Backeberg, Blatter Kakteenforsch., No. 6, p [12], 1938

Krainzia longiflora v. albispina

Krainzia longiflora v. breviflora

Krainzia longiflora v. stampferi