Harry Potter’s World
Because plants and their uses are important to wizards, all students at Hogwarts are required to take Herbology. In Harry’s second year, he learns how to grow mandrakes, real plants studied by historical botanists. Although it isn’t his favorite subject, the young wizard soon comes to appreciate Herbology when he discovers that mandrake is the key ingredient of a potion that will cure his severely injured classmates. In his fourth year, Harry is once again reminded of the value of studying plants when he must find a way to breathe underwater during the Triwizard Tournament. Harry’s classmate teaches him about gillyweed, a fictitious plant that, when ingested, gives its user fins and gills.