Roger F. Anderson, Fort Atkinson, Wisconsin introduced some 50 or so named (registered) peony hybrids. He is a especially known for his intersectional (Itoh) hybrid peonies. In 2013, Swenson Gardens purchased Anderson's last generation of seedlings and are introducing new Itoh hybrids in 2018.
I have about 35 Itoh peonies, 21 were bred by Anderson:
Paeonia 'Andersons Kaleidoscope', Paeonia 'Bartzella', Paeonia 'Callies Memory', Paeonia 'Canary Brilliants', Paeonia 'Copper Kettle', Paeonia 'Cora Louise', Paeonia 'Court Jester', Paeonia 'First Arrival', Paeonia 'Going Bananas', Paeonia 'Gordon E. Simonson', Paeonia 'Hillary', Paeonia 'Joanna Marlene', Paeonia 'Julia Rose', Paeonia 'Lemon Dream', Paeonia 'Momo Taro', Paeonia 'Morning Lilac', Paeonia 'Pastel Splendor', Paeonia 'Rosy Prospects', Paeonia 'Scarlet Heaven', Paeonia 'Sequestered Sunshine', Paeonia 'Unique'
Blooming today was Peony 'Hillary'
Paeonia 'Hillary', 2018 photo, (3-SD-R) Itoh intersectional Hybrid Peony, (Anderson, R.F., 1999), USDA Hardiness Zone 4, Medium height, semi-double, creamy red petals, fades to cream with darker center, early midseason bloomer, Michigan Bloom Month 5-6, In Garden Bed S3 for 3.6 YEARS (Broo). Planted in 2014.
Award of Landscape Merit 2009. Planted 2014. Flower was quite ugly in the first year. Much better in the second year.
This years flower was quite different than last years. Not sure which one I like better. Here is last years photo.