This name is a synonym of Mentzelia multiflora (Nutt.) A. Gray.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 18900378) with original publication details: Great Basin Naturalist 46(3): 558, f. 1 1986.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:280785-2.
This name was in version 1 of The Plant List, record tro-18900378.