This name is a synonym of Allium drummondii Regel.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 274774) with original publication details: Res. Stud. State Coll. Wash. 18: 204 1951.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:8749-2.
This name was in version 1 of The Plant List, record kew-274774, and has not been changed.