⚠ Version 1 of The Plant List has been superseded.
This name record (from Tropicos) is not included in version 1.1 of The Plant List. It is possible the same name is included from a different data source, to check this you can search for Melocactus oaxacensis in version 1.1 of The Plant List.
This name is a synonym of Melocactus curvispinus subsp. curvispinus .
The record derives from Tropicos which reports it as a synonym (record 5106331
) with original publication details: Cactaceae 4: 2587, f. 2465 2587 1960.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:156865-2
.