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 349656) with original publication details: Pl. Eur. 1: 200 1890.
This name was in version 1 of The Plant List, record kew-349656.