This name is a synonym of Pennisetum polystachion (L.) Schult..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 432818) with original publication details: Atti Riunione Sci. Ital. 8: 586 1846.
This name was in version 1 of The Plant List, record kew-432818.