Here's a look at the leaves, branches and bark.
Ash trees have compound leaves; they grow in groups of five to nine. The leaflets grow in rows on either side of the central stem.
They also have opposite branching. The branches grow in pairs on opposite sides.
Finally, the bark features closely packed vertical ridges; you may also notice a hint of green.
With concern over the Emerald Ash Borer in South Dakota, you may be wondering how to identify an ash tree.