Irididendros is the world tree of Zairis, and the first living entity seeded on the planet by Iris and also the single largest living entity, standing at 990 feet in diameter and 12,540 feet tall. It serves as the abode of Iris' prime avatar as well as the center of her divine bureaucracy, staffed by her dryads and the Viridian Circle. It is situated in the dead center of Viridian Vale, and the city of Dendropolis was built around it.