I hate to admit it, but I would be tempted to go in your yard after those peonies :)

Beautiful! Thanks for sharing!

The last one seems to be Buckeye Belle - looks exactly like mine and much more common than CARDINAL'S ROBE.

But isn't Buckeye Belle semi-double? I purchased this one as Cardinal's Robe, but how well I know how things can get mixed up. It's hard to keep track of peonies, iris, daylilies--all those names.

Here is my Buckeye Belle.
Half-opened:

Fully opened:

{{gwi:223844}}

I think Cardinal's Robe is supposed to be scarlet red, not dark red. Never saw it in person though.

Mine is definitely not like your picture when fully open. But you are right that it must not be cardinal's Robe. Looks like Illini Warrior. My source must have mislabeled it.