This name is a synonym of Avena pubescens var. sesquitertia (L.) Fiori.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 25559870) with original publication details: Syst. Nat. (ed. 12) 2: 99 1767.
This name was in version 1 of The Plant List, record tro-25559870.