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 432980) with original publication details: Consp. Fl. Afric. 5: 785 1894.
This name was in version 1 of The Plant List, record kew-432980.