My sister bought a new house this year. There's a tree in the yard that we can't identify. It's located in Mid-Michigan in zone 5a. The soil is mixed with rocks and sand.
The tree has shaggy bark similar to Shagbark Hickory, but the tree produceds a catkin and not a nut. The leaves (4 or 5 inches long) are pointed ovals with serations.
What is it?
Pictures taken in mid Sept, 2018.