This name is a synonym of Helictotrichon argaeum (Boiss.) Parsa.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25560421) with original publication details: Candollea 4: 469 1931.
This name was in version 1 of The Plant List, record tro-25560421, and has not been changed.