This name is a synonym of Allium guttatum subsp. sardoum (Moris) Stearn.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 296498) with original publication details: Stirp. Sard. Elench. 2: 10 1828.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:528795-1.
This name was in version 1 of The Plant List, record kew-296498.