Hermione was the first to raise her hands to answer when asked by Professor Sprout about mandrakes in Herbology class. Hermione said, "Mandrake or Mandragora is a powerful restorative. It is used to return people who have been transfigured or cursed to their original state." Interestingly, at the end of the book, Hermione herself is restored from her petrified state with the help of a mandrake restorative draught.