This name is a synonym of Helictotrichon quadridentulum (Döll) Renvoize.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 397841) with original publication details: Fl. Bras. 2(3): 100 1878.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:272999-2.
This name was in version 1 of The Plant List, record kew-397841, and has not been changed.