Their bold, pink ray of color that seems to almost blind you when you stare at them too long.
But, even with all the pollen, the trees are amazing with the color the cast. Everything around them almost seems to glow with a pink shade for about 3 months.
And, you can see another down-side to these beautiful trees. The THORNS! Yeah, they are a pain when you run into them. We try to keep most of the branches cut from about 6-feet down on the tree that way there isn't any eye-pokers lurking around to stab someone.
I always cut a few limbs off here and there and place them in a large vase in my house just to see the bright colors when I wake up. My bathroom has a black and brown theme to it so these bright, pink Hawthorn limbs bring out a different mood in my bathroom, especially in the morning when I don't want to get up and around. And the leaves and the berries that come after the blooms have fallen off are very edible too.
The tiny blooms do look amazing in a small dish of water.