All About Nutmeg And Mace

Nutmeg is the seed, and Mace is the aril that covers it.
Nutmeg grows inside a Drupe that splits open and reveals the Aril around the seed. The Aril is removed (mace) and them the seed is split open to reveal the actual nutmeg.
Nutmeg is not a nut and does not pose a risk to people with nut allergies.