We have four winners who identified the red shoots as peonies. I should have asked them to figure out which one it is!
It is, in fact, a very special one, a yellow herbaceous peony affectionately called 'Molly the Witch', but known botanically as Paeonia mlokosewitschii. It has this beautiful reddish purple in the spring leaves, beautiful powdery blue/pink early on, a single pale yellow flower early in peony time, and red and blue seeds in the fall....a true star over many months.
Fall seeds of the Paeonia mlokosewitschii. The red seeds are infertile, the blue, fertile