Melocactus jansenianus Backeb. in Blätt. Kakteenf. 1935(2): 2. 1935
Melocactus jansenianus in Blätt. Kakteenf. 1935(2): 2. 1935
is basionym for Cactus jansenianus, Cacti, ed. 1: 279. 1937
Melocactus jansenianus in Blätt. Kakteenf. 1935(2): 2. 1935
Taxon for this name