This name is a synonym of Mimulus nasutus var. insignis (Greene) A.L. Grant.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50102104) with original publication details: Man. Bot. San Francisco Bay 277 1894.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:162213-2.
This name was in version 1 of The Plant List, record tro-50102104.