When can we expect to receive our prizes? Just kidding... but I did some further research (ok, I Googled) and it is indeed a hybrid Peony. Paeonia 'Claire de Lune' (single Peony). To quote Perennials.com: "This single-flowered, Japanese type has delicate, creamy-yellow to ivory petals, with a contrasting yellow centre to the flower. Very early."

Also, they are known to have the slight pinkish cast as exhibited by Mr. Fudges example early in the bloom stage.

The Claire de Lune name I guessed was triggered by a memory of my late Grandmother's Peony that she treasured.

Thank you for all you do, Ed. - Darryl Smith