Melocactus intortus (Mill.) Urb., Repert. Spec. Nov. Regni Veg. 16: 35. 1919
Melocactus intortus, Repert. Spec. Nov. Regni Veg. 16: 35. 1919
is new combination for Cactus intortus, Gard. Dict., ed. 8: Cereus no. 2. 1768
Melocactus intortus, Repert. Spec. Nov. Regni Veg. 16: 35. 1919