This name is a synonym of Erythronium oregonum Applegate.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 276607) with original publication details: Cycl. Amer. Hort. 548 1900.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:96858-2.
This name was in version 1 of The Plant List, record kew-276607, and has not been changed.