Melocactus lobelii Valck.Sur. in Verh. Kon. Ned. Akad. Wetensch., Afd. Natuurk. 5: 7. 1896
Melocactus lobelii in Verh. Kon. Ned. Akad. Wetensch., Afd. Natuurk. 5: 7. 1896
is basionym for Melocactus caesius subsp. lobelii in Cactology 2: 5. 2010
is basionym for Melocactus curvispinus f. lobelii in Bradleya 9: 76. 1991
is basionym for Melocactus curvispinus subsp. lobelii in Revista Acad. Colomb. Ci. Exact. 26: 356. 2002