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 50088171) with original publication details: Botany (Fortieth Parallel) 114 1871.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:157387-2.
This name was in version 1 of The Plant List, record tro-50088171.