This name is a synonym of Mimulus luteus var. variegatus Hook..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50299531) with original publication details: Physis (Buenos Aires) 9: 320 1929.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:805983-1.
This name was in version 1 of The Plant List, record tro-50299531.