Malacocarpus ottonis (Lehm.) Britton & Rose, Cactaceae 3: 195–197. 1922
Malacocarpus ottonis, Cactaceae 3: 195–197. 1922
is new combination for Cactus ottonis, Index Sem. (Hamburg): 16. 1827
Malacocarpus ottonis, Cactaceae 3: 195–197. 1922
Taxon for this name