I'll assume you are referring to the bluish green foliaged plant to the left of those variegated Aeonium 'Sunburst', at the top of the Lysimachia patch. Those are the winter blooming Corsican Hellebore, Heleborus argutifolius. If you have other plant questions, go to my Flickr site for the rest of this set of photos of this garden, most if not all of the plants are identified in those additional photos.