I have submitted photos for paeonia obovata alba in paeonia obovata - there is also an entry for paeonia obovata subsp. obovata. I'm not sure if this is a duplication or two distinct species, but thought I would draw your attention to it in case there is an error.

There are two subspecies of Paeonia obovata. Paeonia obovata subsp. willmottiae and Peonia obovata subsp. obovata. If you know the subspecies then you should post photos there. If you are not sure which subspecies you have then it should be place under just Paeonia obovata.