Cactus placentiformis Lehm. in Del. Sem. Hort. Hamburg. 1826
Cactus placentiformis in Del. Sem. Hort. Hamburg. 1826
is basionym for Discocactus placentiformis in Engler & Prantl, Nat. Pflanzenfam. 3(6a): 190. 1894
is basionym for Echinocactus placentiformis in Martius, Fl. Bras. 4(2): 246. 1890
is basionym for Melocactus placentiformis, Prodr. 3: 460. 1828