This name is a synonym of Hyparrhenia umbrosa (Hochst.) Andersson ex Clayton.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 406304) with original publication details: Notizbl. Bot. Gart. Berlin-Dahlem 10: 598 1929.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:397031-1.
This name was in version 1 of The Plant List, record kew-406304.