This name is a synonym of Centranthus angustifolius (Mill.) DC..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 33500514) with original publication details: Hist. Pl. Dauphiné 2: 280 1787.
This name was in version 1 of The Plant List, record tro-33500514.