Do any of the leaves in the picture belong to the bare stems? If you could post a photo of any individual leaves, and also a clearer close-up of a twig showing the nodes (joints) it would help. From what I can see it has oppoosite leaf/branch arrangement which would rule out elm, but more pictures would help with identification. I'm not sure any of the green leaves I can see look like ash either. A picture from further back showing the whole plant would also help.
