These are blueberry leaves.
For a brief time, they turn this glorious color; each leaf a variation of red/yellow/green depending on where it is on the branch, how much sun it gets and where the shadow of other leaves fall across it.
There is just no match with Nature.
Every year it's a wonder. Sometimes I pick them and put them into an old bookbinding press between sheets of blank newsprint. They keep most of their color.
This year, though, I just picked and handful of the prettiest ones and laid them out on the kitchen table.
Think I'll use this in our Christmas letter.