This name is a synonym of Vicia americana Willd..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13007166) with original publication details: Reise Nord-America 2: 434 1841.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:265004-2.
This name was in version 1 of The Plant List, record tro-13007166.