Fraxinus americana.
The name would be Fraxinus americana.
Fraxinus ornus
The scientific name is Acer negundo. I found this on http://www.wildflower.org/plants/result.php?id_plant=ACNE2
The Mountain Ash is Sorbus aucuparia. I know of no tree called the Rocky Mountain Ash.
The name would be Fraxinus excelsior.
Sorbus americana
Fraxinus excelsior (European) Family: Oleaceae.
Rowan or Sorbus aucuparia.
The White Ash reproduces by grafting and by its seeds. YOUR WELCOME!
It depends on the species but beech trees are members of the genus Fagus. For instance, the American beech is Fagus grandifolia.
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White ash is a serrated lobe because of the leaf and it isn't normally classified as smoothe leaf.