I lost the information on this plant. I'm pretty sure it was a Klehm's peony. I've done web searches to try to identify it, but nothing I found is quite right. I found a photo of "Companion of Serenity" that looked a lot like this, but then found two other photos of Companion that showed much darker pink and more ruffled petals.
The blooms are, indeed, beautiful! I was hoping that someone would check with Klehm's Songsparrow Nursery to find out if they could identity the tree peony in your photo. As I was anxious to know, I finally emailed Klehm's, myself, and they responded as follows.
"Thank you for your inquiry. We asked Roy Klehm to take a look at the photo and he agrees that it is likely Tree Peony 'Companion of Serenity'.
Keep in mind that the color intensity of a plant can vary from blossom to blossom. Other influences such as amount of sunlight, geographical location, time of day, soil nutrients, etc. may affect the color of the blooms.
Tree Peony 'Companion of Serenity' is a wonderful cultivar. We highly recommend it. Please visit our website if you wish to place an order.
We hope this information is helpful and look forward to hearing from you. "
Tannis at Song Sparrow Farm
13101 East Rye Road
Avalon, WI 53505