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 (record 432868) with original publication details: Pflanzenw. Ost-Afrikas B: 53 1895.
This name was in version 1 of The Plant List, record kew-432868.