Tucolo trees are found out in the wide open Savannas patrolled by the clansmen of Loar. They are a tall tree whose lowest branches fall off as the tree grows. The older the tree, the taller it gets and the broader it's petiole and fronds become.
The oldest of the trees, those who are said to have survived the Sundering, have fronds that can hold an adult clansman while he sleeps. The shape of the fronds does not allow for rolling off of the frond so there is no concern for falling off. The lowest fronds are shaded by newer, thicker but softer fronds above during the day making the lowest branches a favored resting spot for clansmen out hunting aberrations or just getting away.