This name is a synonym of Mentzelia scabra subsp. chilensis (Gay) Weigend.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 18900177) with original publication details: Revista Mus. La Plata 5: 291 1893.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:157410-2.
This name was in version 1 of The Plant List, record tro-18900177, and has not been changed.