This name is a synonym of Hyparrhenia nyassae (Rendle) Stapf.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 393576) with original publication details: Bull. Jard. Bot. État 6: 24 1919.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:388714-1.
This name was in version 1 of The Plant List, record kew-393576, and has not been changed.