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 371000) with original publication details: Cycl. Amer. Hort. 548 1900.
This name was in version 1 of The Plant List, record kew-371000, and has not been changed.