This name is a synonym of Hyparrhenia wombaliensis (Vanderyst ex Robyns) Clayton.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25525765) with original publication details: Fl. Agrost. Congo Belge 1: 128 1929.
This name was in version 1 of The Plant List, record tro-25525765, and has not been changed.