This name is a synonym of Aristida adscensionis L..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50203803) with original publication details: Fl. Bras. Enum. Pl. 2(1): 387 1829.
This name was in version 1 of The Plant List, record tro-50203803.