Beautiful work.
However, to be honest, the trees need more work. This style of tree would work for something like a palm tree really nicely. But for the maple tree or whatever it is just seems too weird. Would it be possible to put the lollipop tree in the middle and have the leaf models coming out of it?
There's some strange shadows on the ground, I'm not sure if it's from the terrain or the hint brushes, just looks strange.
It's also a sign that you're a stand up man, since you've already proven your mapping abilities and have come to this forum allowing others to make suggestions.
Good job 4th