Wolfbane was an herb stored by Brother Farrow and found in Mossflower Woods. Veil Sixclaw used it to poison an oat-and-barley water that Myrtle drank. Veil was intending to kill Friar Bunfold with it for twisting his ear.
Two herbs may have inspired the plant that appears in the series:
- Wolfsbane, a flowering purple plant. If applied to the skin or eaten, it can prove to be fatal.
- Wolf's bane, a type of tobacco often used for muscle treatment.