mountain ash

noun4

1. •
   (UK) A European tree, rowan or, more specifically, European rowan, of species Sorbus aucuparia.

   • On the verdant slope and down by the edge of the water, the bird-cherry and the mountain ash displayed their flowery garb of summer. — 1886
2. •
   Any of several trees in the genus Sorbus in North America.

   • All three mountain-ashes are shrubs of climax and subclimax northern coniferous forest communities, along with speckled alder, Labrador tea, mountain and red maples, yellow birch, and bunchberry. — 1974
3. •
   A tree native to southeastern Australia, Eucalyptus regnans, the tallest of all flowering plants.
4. •
   A Texan ash tree of species Fraxinus texensis.