This name is a synonym of Allium longifolium (Kunth) Spreng..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 296516) with original publication details: Pl. Hartw. 26 1840.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:528813-1.
This name was in version 1 of The Plant List, record kew-296516.