The Mace spice (Myristica fragrans of the family Myristicaceae) is the lacy outer layer encircling a whole nutmeg seed and is the sister spice of nutmeg. The trees are the only plant to give us two spices. Mace, a spice, consists of the dried aril, or lacy covering, of the nutmeg fruit of Myristica fragrans, a tropical evergreen tree. Spice benefits your health in many ways. It has several antidepressant, anti-fungal, and anti-inflammatory