This name is a synonym of Mentzelia dispersa S. Watson.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50088183) with original publication details: New Man. Bot. Centr. Rocky Mt. 324 1909.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:157453-2.
This name was in version 1 of The Plant List, record tro-50088183.