This name is a synonym of Mentzelia rusbyi Wooton.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50113806) with original publication details: Man. Pl. Colorado 641 1954.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:157479-2.
This name was in version 1 of The Plant List, record tro-50113806, and has not been changed.