@Fleur569 They are much more pink when small. Last year, when I took the photo, was unusual for them. They were paler, but also stayed curled. If you look at the picture closely you can see that on most of the blooms the 4 petals are not detached from each other.
I suspect that this is actually a bee driven hybrid pink as most of the other trees nearby are white. The petals being a pale pink and not the brighter pink you find on some varieties.