mystery young tree

Young, 10 ft tall, leaves compound, alternate serrated. Not sure if the dried fruit is actually from the tree or a vine climbing the tree. Infested with some fuzzy blue stuff along branches.

Mystery tree with white flower clusters

Tree is about 30 feet tall, bark is smooth. Leaves are alternate, ovate? with pinnate veins and entire margins and pointy tips. Flower petals look narrower than prunus serotina, and bark doesn't seem consistent. Started flowering mid March. No fruit yet.