blue ash Oleaceae Fraxinus
Leaf: Opposite, pinnately compound, 7 to 11 ovate or lanceolate leaflets with a serrated margin, overall length 7 to 11 inches, shiny green above, dull and paler below.
Flower: Perfect, in panicles that appear before the leaves, pale green.
Fruit: Wide-winged samara, 1 to 1 1/2 inches long, flattened seed.
Twig: Stout, distinctly 4-angled or winged (especially on new or rapid growth), light gray-brown when mature; buds gray to reddish brown; leaf scars notched.
Bark: Ashy gray to brown, rough scaly when young, later developing irregular fissures and scaly ridges.
Form: A medium sized tree reaching up to 70 feet tall with a short bole and an irregular crown.
Looks like: green ash - white ash - black ash - boxelder