Mags, you give me way too much credit. I'd have to go out and look, but, I don't remember that yellow center... Here is a picture of mine.... But she does smell heavenly. You just grow yours better than I do. Some pictures of her have the yellow center and some don't. You take such better care of your plants than I do and they reward you for it.
All of your peonies are lovely, and I can't wait to see more pictures...