E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Mountain Ash (The),
or Rowantree, botanically called Pyrus aucupara, which does not belong to the same family of plants as the fraxnus, or Common Ash. The Mountain Ash is icosandria, but the Common Ash is diandria. The Mountain Ash is pentagyna, but the Common Ash is monogyna. The Mountain Ash is of the Natural Order rosacæ, but the common Ash is of the Natural Order sepiaræ; yet the two trees resemble each other in many respects. The Rowan or Rown-tree is called in Westmoreland the Wiggen-tree. It was greatly venerated by the Druids, and was called the Witchen by the early Britons, because it was supposed to ward off witches.