This name is a synonym of Allium cernuum Roth.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 274767) with original publication details: Ottawa Naturalist 31: 56 1917.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:8722-2.
This name was in version 1 of The Plant List, record kew-274767, and has not been changed.