This name is a synonym of Vicia montevidensis Vogel.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13013650) with original publication details: Darwiniana 14(1): 175 1966.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:265082-2.
This name was in version 1 of The Plant List, record tro-13013650, and has not been changed.