Mountain ash

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Mountain ash is a name used for several trees, none of immediate relation. It may refer to:

  • Eucalyptus regnans, the tallest of all flowering plants and other floral species
  • Fraxinus texensis, an ash tree species in Texas
  • In Ireland and Britain it is used exclusively for Sorbus aucuparia, which is also commonly known as Rowan.
    • In North America (mainly U.S.) trees in the subgenus Sorbus subgenus Sorbus are often styled as mountain-ashes to convey their unrelatedness to true ashes.