This name is a synonym of Opuntia microdasys subsp. rufida (Engelm.) U. Guzmán & Mandujano.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 5108120) with original publication details: Rep. (Annual) Missouri Bot. Gard. 21: 169, t. 23 1910.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:175262-2.
This name was in version 1 of The Plant List, record tro-5108120, and has not been changed.