Rowan or Sorbus aucuparia.
The Mountain Ash is Sorbus aucuparia. I know of no tree called the Rocky Mountain Ash.
Another name for the European mountain ash is the Rowan tree.
Fraxinus ornus
The scientific name is Acer negundo. I found this on http://www.wildflower.org/plants/result.php?id_plant=ACNE2
Fraxinus americana.
Rowan the Mountain Ash
The name would be Fraxinus excelsior.
Sorbus americana
The name would be Fraxinus americana.
Fraxinus excelsior (European) Family: Oleaceae.
The scientific or taxonomic name would be Pristiphora geniculata.
The English translation for the Russian tree name "самшит" is "mountain ash" or "rowan tree."