Thatīs very interesting, Koen. Loving scented plants, I smelled at the flower, and it had a slight scent. Reminding me more of the shrubby peonies than P. lactiflora.
A friend collected seed in Turkey and succeeded to germinate them, but lost the seedlings afterwards. My seedling took 2-4 years more to reach flowering size than the 3 P. mlokosewitschii seedlings I received together with it.
Some sources mention white forms of P. kesrouanensis, but perhaps the very pale pink form shown here is meant.
https://www.nargs.org/paeonia-2014