This name is a synonym of Euphorbia characias subsp. wulfenii (Hoppe ex W.D.J.Koch) Radcl.-Sm..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 349286) with original publication details: Fl. Italia 2: 289 1901.
This name was in version 1 of The Plant List, record kew-349286, and has not been changed.