⚠ Version 1 of The Plant List has been superseded.

This name is in version 1.1 of The Plant List, record tro-5100992, and has not been changed.

Mammillaria microcarpa var. auricarpa W.T. Marshall is a synonym of Mammillaria grahamii Engelm.

This name is a synonym of Mammillaria grahamii Engelm..

The record derives from Tropicos which reports it as a synonym (record 5100992) with original publication details: Des. Bot. Gard. Ariz. 1: 106 106 1950.

Full publication details for this name can be found in IPNI: urn:lsid:ipni.org:names:151267-2.