I am dying to know if there a term or something to describe and define why and how the color of the hydrangea petal just looks like it is on a layer, sitting on top of the petal. And during the winter, the color sort of "scratches" off leaving the the petal revealing the skeleton. I don't think I have seen that process on leaves? Or any other flower petal, have you?
Walking in Derbyshire England
5 hours ago