Ulmus americana IDed by expanding the pictures I took (below) enough that I could kind of see the shape of the buds. They look like American elm flower buds (the leaf buds are probably so small that the photo quality makes them imperceptible). The bark and shape of the tree also match the American elm ID. I was too lazy to bother crossing the street to get a better look, so I definitely want to revisit this one and make sure the buds really do match.
