This name is a synonym of Mimulus glabratus var. jamesii (Torr. & A. Gray ex Benth.) A. Gray.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50102114) with original publication details: Prodr. 10: 371 1846.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:805975-1.
This name was in version 1 of The Plant List, record tro-50102114, and has not been changed.