This name is a synonym of Stipagrostis zeyheri subsp. sericans (Hack.) De Winter.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 395158) with original publication details: Bull. Herb. Boissier 3: 381 1895.
This name was in version 1 of The Plant List, record kew-395158, and has not been changed.