Any Idea?

My morning strolls with Elvis through the woods allow me to take a little more time to look at the flowers that are starting to appear. Its spring, and the variety is interesting. I have spent some time trying to identify them, all that is, except the main picture. I think it is a form of spurge, but am not sure at all. Anyone that can identify it will be most welcome to comment. The rest are, in order, Wild Primroses, Lungwort, Lesser Celandine (or pilewort), Violets and Wild Three-Cornered Garlic, I think they are right, unless, of course, I can be corrected by the experts out there.