Nutmeg or Myristica fragrans is an evergreen tree indigenous to the Banda Islands in the Moluccas of Indonesia, or Spice Islands. Until the mid 19th century this was the world's only source. The nutmeg tree is 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 mm to 30 mm (1 inch) long and 15 mm to 18 mm (¾ inch) wide, and weighing between 5 g and 10 g (¼ ounce and ½ ounce) dried, while mace is the dried "lacy" reddish covering or arillus of the seed. This is the only tropical fruit that is the source of two different spices.