Mountain Ash

Mountain Ash likely refers to the Sorbus scopulina, a small to medium-sized deciduous tree common in Northern California.

The tree, also known as Rowan, is woven throughout the folklore of many regions as a ward against evil beings.

Within the mythology of MTV’s Teen Wolf, Mountain Ash exhibits control over werewolves and other supernatural creatures.

Examples

Peter Hale could not pass over a balustrade made of the wood in Formality.

Isaac and Erica could not cross a line of Mountain Ash powder in Raving.

Capsules filled with Mountain Ash powder and ingested by Gerard cause him to violently reject a werewolf bite in Master Plan.

Dr. Deaton says his animal clinic is lined with Mountain Ash "making it difficult for someone like Scott to cause me any trouble".

Teen Wolf Creator Jeff Davis has called Mountain Ash “magic” but the mechanism through which it exerts power is unclear.