Various things I didn't know before...
The Rowan tree (also known as Mountain Ash, Quicken Tree, Quick Beam, Witchwood, Wiggen, Witcher and Sorb Apple) grows throughout northern Europe (Sorbus Aucuparia) as well as in the northeast part of North America (Sorbus Americanus). They are members of the Rose family and grow to be about 50 feet tall. They can strive in poor soil and colonize easily in disturbed areas. In some parts of Europe they are very common around ancient settlements and Stone Circles, probably due to having been planted. The Rowan is noted for having lovely white flowers in May and, every third year, berries that turn bright red in winter.