I had never heard of orris root. I googled it and found that it is used not only in perfumes and potpourri, as part of a spice mix and as a tincture to flavour syrup.
Here's a short quote from a wikipedia article:
In perfume
Typical iris perfumes (where orris prevails over the other components) are: "Orris Noir" by the London-based perfume house Ormonde Jayne Perfumery,[1] "Infusion d'iris" (Prada*); "Iris Silver Mist" (Serge Lutens*); "Tumulte" (Christian Lacroix*); "Aqua di Parma"* and "Iris nobile" (Aqua di Parma*); "Irisia"(Creed*); "Y" (Yves Saint Laurent*) and "Vol de nuit" (Guerlain*). "Orris Noir" contains regular orris root oil, not the oil of Iris nigricans, which is an endangered species.
In cuisine
Orris root is often included as one of the many ingredients of Ras el hanout, a blend of herbs and spices used across the Middle East and North Africa, primarily associated with Moroccan cuisine.
Orris root has been used in tinctures to flavour syrups; its taste is said to be indistinguishable from raspberry.[2]
The things we learn on this forum...
who would guess!