The Wiggentree is a magical rowan. Its bark is used in potion-making (Wiggenweld Potion), and the tree is guarded by Bowtruckles. Anyone who touches the trunk of one of these trees will be protected from Dark creatures as long as they are doing so. Mathilda Grimblehawk and her partner investigated an incident when muggle construction workers attempted to chop down a Wiggentree and were attacked by bowtruckles.