Mandrake (or mandragora) is a plant that grows big leaves and the root looks like a baby. When you pull it out of it’s pot it screams. A baby mandrakes scream can temporarily knock you out but a full grown mandrake cry can be fatal. Once they are fully grown they can be taken out and put in a potion to make people that are petrified come back. They are grown in the Herbology classrooms at Hogwarts.