Mandrake
A Mandrake is a plant with a humanoid root whose cry can kill. Hogwarts students repot young Mandrakes while wearing earmuffs. The mature plants are used in the Restorative Draught that revives people petrified by the Basilisk.
In the books
Harry Potter and the Chamber of Secrets
Chapter: Gilderoy Lockhart
The second-year Herbology class repots screaming Mandrake seedlings in the greenhouses.
A short verified quotation is not printed here yet.