This name is a synonym of Centranthus calcitrapa (L.) Dufr..
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 33500540) with original publication details: Prodr. Stirp. Chap. Allerton 56 1796.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:859907-1.
This name was in version 1 of The Plant List, record tro-33500540.