Ironwood

Ironwood is a type of trees which grow deep in the forests of Skyrim.

Physical Properties
The wood from these trees is as hard as the metal for which they are named.

Alchemical Effects
The very rare black ironwood tree is said to produce a, Ironwood Nut which is very succulent and is believed to enhance the strength of the adventurer who is able to crack its shell.

Behind the Scenes
Ironwood Nut served as a rare alchemical ingridient in The Elder Scrolls IV: Oblivion, however, it is not even mentioned in The Elder Scrolls V: Skyrim. Which is odd due to the fact that it's native to the province.