The Name of the Rose

I just finished rereading the excellent "The Name of the Rose" by Umberto Eco. Perhaps the strongest reason I had for rereading it was to understand why he chose that particular title. Pretty much the only clue the reader gets is the last sentence in the book:

stat rosa pristina nomine, nomina nuda tenemus.

This doesn't help an awful lot even if you understand latin (or have the translation as I do). But with a bit of googling I found the following page called The Name of the Rose. There you will find a quote from Eco giving some hint about the title. I'm still very puzzled though and if you read this and have any clues, please contact me.