This name is a synonym of Allium lacunosum var. davisiae (M.E.Jones) McNeal & Ownbey.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 296334) with original publication details: Bull. S. Calif. Acad. Sci. 20: 49 1921.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:528673-1.
This name was in version 1 of The Plant List, record kew-296334, and has not been changed.