This name is a synonym of Stellaria media subsp. cupaniana (Jord. & Fourr.) Nyman.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Nuov. Giorn. Bot. Ital. II, 15 : 5 1908.
This name was in version 1 of The Plant List, record kew-2481802, and has not been changed.