The picture illustrating the Centaurea cineraria page seems to be of Jacobaea maritima. The flowers resemble J. maritima and don’t look like Centaurea flowers. According to Wild Flowers of the Mediterranean by Marjorie Blamey and Christopher Grey-Wilson (2nd ed., Bloomsbury, London, 2004), the flowers are purple.
I see what you mean. I replaced it on the cover page and will work on getting it moved to Jacobaea maritima at the image provider. Thanks for reporting!