Now firstly, this isn't intended as a critique or complaint or anything.  After all, the trees haven't done anything so far in the story line except provide shade!  I'm just the curious sort.  I also don't like posting things that are incorrect or not what my GM ordered.  It always sucks when the GM orders a pepperoni pizza and gets a deluxe because someone else didn't get the order correct!

That's when the author in me asks the questions for when the time comes:

[LIST]
[*] How are the trees attacking?  Through vines or limbs or is it throwing leaves like shuriken?
[*] Are the trees ambulatory?
[*] Is it all the trees in the forest or only every third or fourth tree, or just those in a specific area?
[*] What is animating these trees?  After all, have you ever tried to kill a tree?  They're pretty tough.  It might be better to go after the thing or person doing the animation!
[/LIST]

Of course, that last part may not be so obvious...