This name is a synonym of Helictotrichon convolutum (J.Presl) Henrard.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25559538) with original publication details: Candollea 4: 419 1931.
This name was in version 1 of The Plant List, record tro-25559538, and has not been changed.