This name is a synonym of Opuntia macrorhiza subsp. potosina (Hern.-Valencia) U. Guzmán & Mandujano.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50335290) with original publication details: 1988.
This name was in version 1 of The Plant List, record tro-50335290, and has not been changed.