This name is a synonym of Sporobolus tenuissimus (Schrank.) Kuntze.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 389031) with original publication details: Agrostogr. Bras. 33 1823.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:385356-1.
This name was in version 1 of The Plant List, record kew-389031.