⚠ Version 1 of The Plant List has been superseded.
This name is in version 1.1 of The Plant List, record tro-50181098, with some changes.
This name is a synonym of Mammillaria standleyi (Britton & Rose) Orcutt.
The record derives from Tropicos which reports it as a synonym (record 50181098) with original publication details: Cact. Succ. J. (Los Angeles) 12: 155 155 1940.
Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:151709-2.