Only its later homonym Centaurea sicula DC., non L. has been mentioned once for Greece, as C. sicula [DC., non L.] var. schouwii (DC.) Fiori from Rhodos (Fiori 1924: 42), but was doubted already by Rechinger (1944: 668), and the variant not even mentioned by Kleinsteuber & al. (216: 170).
That is why we did not mention (for EAe) in VPG 2013 Centaurea solstitialis subsp. schouwii (DC.) Gugler (= Centaurea sicula subsp. schouwii (DC.) Nyman).