Those are actually Birch trees that I made a while ago. They're based on real world approximations though and it was meant to be the largest of all the Birch models.
It could be the editor making it look a bit large or the scaling on the vegetation tool made it a bit too big.
Think I might redo the grass though, going to aim at something more along the lines of Hell's Highway:
[Blocked Image: http://ucables.com/img/extra/BROTHERS-IN-ARMS-HELL-R70537-3.jpg]