When is a rose not a rose?

Unsurprisingly the letter V runs throughout the film V for Vendetta. In the original graphic novel, the protagonist leaves a rare rose called Violet Carson alongside each of his victims. Using a flower named after such an iconic figure from British popular culture seems to me a flourish typical of the writer Alan Moore.

Violet Carson, the rose is a pink double and hard to come by, so they used the easily available red Grand Prix rose which they renamed for the film as Scarlet Carson.