The Tree of Life is exclusive ONLY to halloween, in which case the new map for halloween has a Tree of Life in the middle. The Tree requires 55 pumpkins in order to do some mysterious thing that no one should know about.
The Pumpkins are classic. They glow a glow similar to Plants, and you can Grav-gun then and pocket them.
Bugs
-Pumpkins spawn in the ground or in walls ocassionally
-Pocketing pumpkins, after a while destroys it.
Trivia
-The pumpkin explodes once its near enough to the Tree, counting it for -1 out of the 55 required, making it 54.