Discocactus placentiformis var. pugionacanthus (Buining & Brederoo) P.J.Braun & Esteves in Kakteen And. Sukk. 44: 105. 1
Discocactus placentiformis var. pugionacanthus in Kakteen And. Sukk. 44: 105. 1993
is new combination for Discocactus pugionacanthus, Discocactus: 61. 1976