This name is a synonym of Stipagrostis zeyheri subsp. macropus (Nees) De Winter.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 394470) with original publication details: Fl. Afr. Austral. Ill. 176 1841.
This name was in version 1 of The Plant List, record kew-394470.