Melocactus curvispinus subsp. koolwijkianus (Suringar) G.Thomson in Bradleya 20: 38. 2002
Melocactus curvispinus subsp. koolwijkianus in Bradleya 20: 38. 2002
is new combination for Melocactus koolwijkianus in Verslagen Meded. Afd. Natuurk. Kon. Akad. Wetensch., ser. 3, 2: 184. 1886 ["1885"]
Melocactus curvispinus subsp. koolwijkianus in Bradleya 20: 38. 2002