Ironwood
Ironwood is a slightly magical evergreen oak tree found in pockets all over Azeroth, but most common in Northern Kalimdor.
These trees are large and slow growing, and it's wood is very hardy and has versatile use in construction. As they reach massive size they grow hollow in the center. Kaldorei and other peoples and creatures make domiciles within them.
Both kaldorei and queldorei use it for ballistae and ship construction. Kaldorei also treat the wood so that it can become as hard as iron while remaining light. This treated wood is used to craft armor.
Petrified Ironwood is a variety that exists specifically in the Felwood. It's hard to confirm whether or not the trees are still alive.
