This name is a synonym of Allium peninsulare Lemmon ex Greene.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 296061) with original publication details: Bull. S. Calif. Acad. Sci. 19: 55 1920.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:8820-2.
This name was in version 1 of The Plant List, record kew-296061.