⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record kew-2360014, and has not been changed.
This name is a synonym of Melocactus curvispinus subsp. caesius .
The record derives from WCSP (in review) which reports it as a synonym with original publication details: Nova Acta Phys.-Med. Acad. Caes. Leop.-Carol. Nat. Cur. 18(Suppl. 1): 184 1841.