This name is a synonym of Mimulus tenellus var. nepalensis (Benth.) Tsoong.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50056790) with original publication details: Madras J. Lit. Sci. 4: 375 1836.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:805873-1.
This name was in version 1 of The Plant List, record tro-50056790, and has not been changed.