This name is a synonym of Erythronium multiscapideum (Kellogg) A.Nelson & P.B.Kenn..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 306776) with original publication details: Proc. Calif. Acad. Sci. 1: 46 1855.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:106063-2.
This name was in version 1 of The Plant List, record kew-306776, and has not been changed.