This name is a synonym of Eryngium triquetrum subsp. xauense (Pau) Jovet & Sauvagee.
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a synonym with original publication details: Bol. Real Soc. Esp. Hist. Nat. 21: 277 1921.
This name was in version 1 of The Plant List, record kew-2799637.