This name is a synonym of Vicia monantha subsp. triflora (Ten.) B.L.Burtt & P.Lewis.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13035088) with original publication details: Prod. Fl. Nap. p. xlii .
This name was in version 1 of The Plant List, record tro-13035088, and has not been changed.