Interesting throwaway on Hermione at JKR's updated site (dragon's blood)

[zgirnius]

No: HPFGUIDX 149394

Carol:
> If so, JKR probably concluded that a list of twelve
> uses of anything would be tedious, whether it was Snape or Hermione
> who recited it and either eliminated the question or substituted, say,
> the aconite question for it. (The bezoar and DLD questions have a
> point; bezoars have already come into play in saving Ron's life in
> HBP, and I suspect that the DLD will be important in Book 7, perhaps
> in connection with Emmeline Vance. The aconite question seems merely
> thrown in, or at least I have yet to see its significance.)

zgirnius:
Aconite is also known as Wolfsbane. Possibly an ingredient in the 
potion of the same name?