This name is a synonym of Eragrostis leptostachya (R.Br.) Steud..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an invalid name (record 435737) with original publication details: Mem. Wern. Nat. Hist. Soc. 3: 300 1821.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:416886-1.
This name was in version 1 of The Plant List, record kew-435737, and has not been changed.