green ash

Green Ash Fraxinus pennsylvanica var. subintegerrima
Family: Oleaceae (Olive)
Branching: Opposite

Green Ash is technically a hairless variety of Red Ash, and resembles Red Ash in most other respects. But it's not a black-and-white difference, and there are actually many trees that show intermediate characteristics.

Winter twig of a Green Ash

Another view of a winter twig. Notice how the bottom lateral buds are not perfectly opposite.
This is called "sub-opposite" and it often seen on vigorous Ash shoots

Another view of the twig

Mature bark

Another view of the mature bark