⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-5108412, and has not been changed.
This name is a synonym of Mammillaria heyderi subsp. macdougalii .
The record derives from Tropicos which reports it as a synonym (record 5108412
) with original publication details: Cacti Arizona (ed. 3) 22 22 1969.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:151050-2
.