This name is a synonym of Linaria genistifolia subsp. sofiana (Velen.) Chater & D.A.Webb.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Consp. Fl. Eur. Suppl. 2(2): 232 1890.
This name record (from WCSP (in review)) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Linaria italica in version 1 of The Plant List.