Paeonia mascula, the Male Peony. These are well-developed already, with fat buds.
Steven's Peony, Paeonia steveniana, also going great guns and with fat buds already formed.
The very interesting Paeonia triternata. Mostly green, blueish tinge, not much red or purple in the leaf even at this early stage. Distinctively furled.
One of the subspecies of the Apothecarie's Peony, Paeonia officinalis ssp villosa just showing its nose.
And the enigmatic Paeonia mollis.