This name is a synonym of Allium sphaerocephalon subsp. laxiflorum (Guss.) Giardina & Raimondo.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 372215) with original publication details: Fl. Sic. Prodr. Suppl. 1: 98 1832.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:77087734-1.
This name was in version 1 of The Plant List, record kew-372215, and has not been changed.