According to the RHS and the HPS they can be white or lemon as well as pink.

Leaves look wrong for P. emodi, check this RHS link.

https://www.rhs.org.uk/Plants/12121/Paeonia-emodi/Details

Thanks, SBG. I you're right, think the leaves aren't divided enough. Strange that it should be white when it was described as pink, though. One of life's little mysteries - including the fact that I seem to have 2 of them from different sources (the other is too small to flower) so the muddle is with me, somewhere! I have no order details for more than one that I can find. Obviously a senior moment!

This is the RHS bit on P veitchii
https://www.rhs.org.uk/Plants/180549/i-Paeonia-anomala-i-subsp-i-veitchii-i/Details

I wonder how often the white form shows up and if yours was grown from seed they wont know until it flowers whether it will be pink or white.

Don't know why I wrote lemon my senior moment haha
Also leaves of P emodi are shiny and there are usually more than one flower bud on a stem at a time.

Just had to come in and say my Maiden Name is Veitch LOL ii
Lovely White Paeony.
Jackie xx

Plant hunting forebears, Jackie??