⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-5107991, and has not been changed.
This name is a synonym of Melocactus curvispinus subsp. dawsonii .
The record derives from Tropicos which reports it as a synonym (record 5107991
) with original publication details: Cact. Suc. Mex. 10: 28 28 1965.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:280710-2
.