This name is a synonym of Allium castellanense (Garbari, Miceli & Raimondo) Brullo & al..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 295883) with original publication details: Atti Soc. Tosc. Sci. Nat. Pisa, Mem. 101: 141 1994 publ. 1995.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:990712-1.
This name was in version 1 of The Plant List, record kew-295883, and has not been changed.