This name is a synonym of Pennisetum sieberianum (Schltdl.) Stapf & C.E.Hubb..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 432545) with original publication details: Index Seminum (B) 1855(App.): 25 1855.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:414894-1.
This name was in version 1 of The Plant List, record kew-432545.