|"Is this all real? Or has this been happening inside my head?"
The topic of this article is of a real-life subject that has been mentioned "in-universe" in a canon source. The Harry Potter Wiki is written from the perspective that all information presented in canon is true (e.g., Hogwarts really existed), and, as such, details contained in this article may differ from real world facts.
Tormentil (Potentilla erecta) is a flowering plant in the rose family.
During the 1990–1991 school year at Hogwarts School of Witchcraft and Wizardry, Professor Pomona Sprout grew Tormentil, along with Cowbane and Hemlock in the Herbology greenhouses, in response to an infestation of doxies in Hogwarts Castle in which students were getting bitten and winding up in the Hospital Wing. She had Jacob's sibling, Chiara Lobosca and Barnaby Lee harvest these plants in the greenhouses so Doxycide could be brewed.
- Pottermore (First appearance)
- Wonderbook: Book of Potions
- Harry Potter: Hogwarts Mystery (Mentioned only)