This name is a synonym of Linum extraaxillare Kit..
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(1): 71 1889.
This name was in version 1 of The Plant List, record kew-2873434, and has not been changed.