Here's some pics I took last month of some Tree Peonies blooming at the nursery.
'Hana-kisoi' (Floral Rivalry):
The Tree Peony is of Chinese origin, and dates back to before the year 750. They are essentially hybrids involving at least three species, P. suffruticosa, P. lutea, and P. delavayi. The hybrid selection is then grafted onto a herbaceous peony root stock.
'Howki' (Charming Age):
'Kamada-fuji' (Kamada Wisteria):