It looks like 'High Noon' to me.

Thank you so much! I have compared photos online and it does seem to match pretty closely. Here's hoping I have luck with it. Bought two tree peonies this spring (this one and Yagumo) and both are still in pots. Now the big decision of where to plant here in the Memphis heat. I appreciate your help. Laura

It gets hot here, too, and my 'High Noon' does fine in full sun. It doesn't need much water, either. I have another tree peony ('Rimpoh') that is in part shade, and it does fine there, too. They're pretty tough little guys!