This name is a synonym of Cnemidaria roraimensis (Domin) R.M. Tryon.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 26613767) with original publication details: Acta Bot. Bohem. 9: 154 1929.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:73365-2.
This name was in version 1 of The Plant List, record tro-26613767, and has not been changed.