Thank you for clarifying that - my familiarity with tree peonies vs itohs has grown a LOT (no pun intended) in the past few years. I have Takara, Border charm, and the real cora louise. When I wrote this post two years ago and had no clue that you could get flowers like that on a tree peony and incorrectly assumed that only itohs got the fun stuff.
If this this peony looks like anything you've seen before, I'd love to know. Fairly ashamed I had confused this