on Ulmus americana
on Ulmus americana
on Ulmus davidiana var. japonica
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana.
Some leaves almost fully consumed by the zigzag sawfly.
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana; a relatively isolated individual tree
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana
on Ulmus americana