Fraxinus excelsior (European) Family: Oleaceae.
Fraxinus ornus
The scientific name for an ash hawthorn tree is Crataegus tomentosa.
The Mountain Ash is Sorbus aucuparia. I know of no tree called the Rocky Mountain Ash.
Fraxinus americana.
The name would be Fraxinus excelsior.
Sorbus americana
The name would be Fraxinus americana.
Rowan or Sorbus aucuparia.
carbon
The scientific name for a tangerine tree is Citrus reticulata.
The scientific genus of the dogwood tree is cornus.
The scientific name for a beach tree is Fagus grandifolia.