The nutmegs Myristica are a genus of evergreen trees indigenous to tropical southeast Asia and Australasia. They are important for two spices derived from the fruit, nutmeg and mace. Nutmeg is the actual seed of the tree, roughly egg-shaped and about 20-30 mm long and 15-18 mm wide, while mace is the dried "lacy" reddish covering or arillus of the seed.