This name is a synonym of Sporobolus tenuissimus (Schrank.) Kuntze.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25542848) with original publication details: Syn. Pl. Glumac. 1: 159 1854.
This name was in version 1 of The Plant List, record tro-25542848.