This name is a synonym of Allium unifolium Kellogg.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 295664) with original publication details: Bull. S. Calif. Acad. Sci. 23: 126 1924.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:8779-2.
This name was in version 1 of The Plant List, record kew-295664, and has not been changed.