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 296382) with original publication details: Mem. New York Bot. Gard. 1: 94 1900.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:8858-2.
This name was in version 1 of The Plant List, record kew-296382, and has not been changed.