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 50101967) with original publication details: Proc. Acad. Nat. Sci. Philadelphia 15(3): 71 1863.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:162273-2.
This name was in version 1 of The Plant List, record tro-50101967.