Tree of Cheem

The Forest of Cheem are a group of intelligent, humanoid, trees, first shown in The End of the World. They are native to the Far Future and are descended from the rain forests of Earth. The trees of Cheem look like humanoids with large, intricate heads and wood-like skin. They have retractable vines on their arms, but they aren't supposed to show it in public. The trees of Cheem are made of wood and are therefore highly flammable.

According to the Ninth Doctor, they are of huge financial importance due to their land holdings and forests on various planets; and they have "roots" everywhere. Because of this, several trees of Cheem were found on Platform One in 5,000,000,000 to watch the destruction of Earth. They The group of Trees seen on Platform One was led by Jabe Ceth Ceth Jafe and also included Coffa and Lute.

The Forest of Cheem neither respect nor understand technology, referring to computers as "metal minds" or "metal machines". They were also aware of the Time Lords and their fate in the Time War. The Doctor Who Annual 2006 classifies them as one of the higher species who were aware of the course of the war and its history-changing effects and also states that they were mortified by the bloodshed.