This peony first bloomed for me in 2021 (one flower) and I forgot to check on carpels, stamens, and stigmas but obtained this information from photos taken by others. Unfortunately there is very little information about this peony and I suspect it is rare because it doesn’t grow well.  I obtained mine from a nursery in France.

Cultivar: Camellia
Year: 1942
Seedling No: 14504. Page 23 of Saunders’ Notebook I
Parentage: 6: lactiflora X officinalis Decora Alba
Flower: Color: white “with palest blush of peach pink at base of petals” (Wister)
Form: semi-double
Blooms: Week 4
Carpels: 1-2, green, woolly
Stigmas: white, darken to pink with age
Disc: white
Stamens: filaments light yellow
Plant: Habit: upright 
Foliage color: medium green
Foliage form: leaves are obvate
Height 32-35″ (reported); 22″ in 2021 on 2 year plant
Recommendation: Waiting to evaluate after established
Availability: Rare