This name is a synonym of Hyparrhenia dybowskii (Franch.) Roberty.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 406253) with original publication details: Bull. Soc. Bot. France 55(8): 104 1908.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:396992-1.
This name was in version 1 of The Plant List, record kew-406253, and has not been changed.