This name is a synonym of Helictotrichon planiculme (Schrad.) Pilg..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25532656) with original publication details: Fl. Germ. 1: 381, t. 6, f. 2 1806.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:391674-1.
This name was in version 1 of The Plant List, record tro-25532656.