Malacocarpus nigrispinus (K.Schum.) Britton & Rose, Cactaceae 3: 190–191. 1922
Malacocarpus nigrispinus, Cactaceae 3: 190–191. 1922
is new combination for Echinocactus nigrispinus in Monatsschr. Kakteenk. 9: 45. 1899
Malacocarpus nigrispinus, Cactaceae 3: 190–191. 1922
Taxon for this name