The Crimson Crown is a magical toadstool on ABC's Once Upon a Time.


  • The Crimson Crown can be used to communicate through magical barriers.
  • It is associated with the planet Mercury, and the element of air.
  • It may be used as a fertility charm. Some use the Crimson Crown to aid with astral travel, which is known to be dangerous.
  • Some associate this fungus with Dionysus.
  • There are a number of other folk magic uses for the Crimson Crown, and one may incorporate them at a symbolic level, rather than actually eating them.


  • Their other name, Vermiculus coronam, is Latin for "crimson crown".
  • Apparently, the Crimson Crown can only be used by someone chosen by Merlin.


  • S5, E03: "Siege Perilous"

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