This name is a synonym of Erythronium idahoense H.St.John & G.N.Jones.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 276592) with original publication details: Ill. Fl. Pacific States 1: 427 1923.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:96820-2.
This name was in version 1 of The Plant List, record kew-276592.