Sneezewort is a type of plant that is poisonous to livestock. It is used as an ingredient in the Befuddlement Draught. It was kept with other potion ingredients in the Potions Classroom at Hogwarts School of Witchcraft and Wizardry.
Behind the Scenes
- Sneezewort (Achillea ptarmica) is a member of the yarrow family. The dried leaves of this plant may be used to create a sneezing powder. 
- Sneezewort is also a plant native to the UK, where the series takes place.