I'm not sure about the other parts of the plant. I just always knew they were related, from growing up in a household where my mother was the mistress of baking substitutions (over making a trip to the grocery store for one item).

Nutmeg and mace photo. And here's another. (These are from a Google search but I didn't notice any pages dedicated just to the nutmeg information. I have to run this morning, so I didn't look for very long. Maybe you'll find something here, though.)

SRS