This name is a synonym of Lupinus argenteus Pursh.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 13014485) with original publication details: Leafl. W. Bot. 3(8): 173 1942.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:145788-2.
This name was in version 1 of The Plant List, record tro-13014485.