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 274769) with original publication details: Bull. Torrey Bot. Club 18: 173 1891.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:8725-2.
This name was in version 1 of The Plant List, record kew-274769, and has not been changed.