Nutmeg
Most people are at least aware of nutmeg as a spice. It is the seed of Myristica fragrans, an evergreen tree indigenous to the Moluccas (or Spice Islands) of Indonesia and grown throughout the tropics of Asia and South America. Like all herbs and spices, it’s an aromatic that loses it’s aroma over time so you don’t want to buy more than you will use in a relatively short time. With nutmeg, buying whole seeds and grating it as needed extends its useful life considerably. The seed on top here has been grated down, showing a cross section of the internal structure of the seed.