Paeonia caucasica, the Caucasus Peony (although there are many other species from the Caucasus)
Paeonia tenuifolia ssp lithophila, dwarf form of the Fern-leaf Peony. Flowers close up when the sun isn't on them, but in sun are wide open.
Paeonia kesrouanensis, very similar to Paeonia mascula. The species is from Asia Minor (Turkey to Syria); my plants are grown from seed collected from plants in cultivation and so may not be true to the species.
A group of 4 kesrouanensis; some steveniana behind them.