This name is a synonym of Agrostis mertensii Trin..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym and as an illegitimate name (record 389434) with original publication details: Fl. Bras. 2(3): 27 1878.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:385600-1.
This name was in version 1 of The Plant List, record kew-389434.