Treants were a wide variety of awakened trees. Treants typically had face-like features on their bark, a division between their trunk that formed legs, and long branches that served as arms. Their wood appeared to be solid like stone, but it was actually filled with tubes that carried water from its roots to the areas where it was needed. Diseases such as tube wilt could affect these tubes and therefore the health of the treant. In their adolescence treants were often more energetic, rebellious, and reckless. But as they aged treants preferred to while away their days in quiet contemplation, rooted in place as though they were a normal tree. Any treant that rooted itself in a stand containing a particular sort of tree for at least a year could, over a tenday or so, alter themselves to resemble and possess the physical properties of that type of tree. Certain elder treants were capable of doing this within half a tenday.