At least some content in this article is derived from information featured in Harry Potter: Hogwarts Mystery. Spoilers will be present within the article.
- "He hurried over to Ron, bent down, tapped Ron's leg with his wand and muttered Ferula. Bandages spun up Ron's leg, strapping it tightly to a splint."
- —Lupin conjures bandages[src]
- Ferula is Latin for "rod" and refers to a genus of plants belonging to the carrot family. The Romans called the hollow light rod made from this plant the same name, which were used for walking sticks, splints, and corporal punishment.
- Silphium was a plant used in classical antiquity as both seasoning and medicine. Although its exact identity is unclear, it is believed to have been a now-extinct plant of the genus Ferula. The plant was ascribed with several medicinal properties including the treatment of coughs, sore throats, fevers, indigestion, and more.
- Fennel (Foeniculum vulgare) is a plant in the carrot family that used to have the name ferula before it was given to a genus of related plants.
- As finule (in Old English), fennel is one of the nine plants invoked in the pagan Anglo-Saxon Nine Herbs Charm, a charm intended for the treatment of poisoning and infection.
- Florence fennel is one of the three main herbs used in the preparation of absinthe, an alcoholic mixture which originated as a medicinal elixir in Switzerland and became, by the late 19th century, a popular alcoholic drink in France and other countries.
- Harry Potter and the Prisoner of Azkaban (First appearance)
- Harry Potter: Hogwarts Mystery