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In page Aconitum:

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In the 1931 classic horror film Dracula starring Bela Lugosi as Count Dracula and Helen Chandler as Mina Seward, reference is made to wolf's bane (aconitum); towards the end of the film, "Van Helsing holds up a sprig of wolf's bane".[2] Van Helsing educates the nurse protecting Mina from Count Dracula to place sprigs of wolf's bane around Mina's neck for protection, instructing that wolf's bane, a plant that grows in Central Europe, is used by those dwelling there to protect themselves against vampires.[citation needed][3][4]