This name is a synonym of Mentzelia integra (M.E. Jones) Tidestr..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50298758) with original publication details: Arizona Fl. 566 1951.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:1010174-2.
This name was in version 1 of The Plant List, record tro-50298758, and has not been changed.