What's in a name? According to researchers at Oxford University, it can affect how we perceive smells.
But don't be surprised if your rose doesn't smell as much like a rose as it used to. According to this article (link no longer working, sorry), flower breeders have concentrated on color to the detriment of scent.
Acqua di Parma's Iris Nobile fragrance was inspired by an iris garden near Florence. Read about it in the Times Online.