They look beautiful... but
Looking the the scale of the player, the leaves are about 3 feet long...
Unless it intentional.

Also, the bases of the trees seem chopped off extremely flat, or are they
just penetrating a grey floor?

Keep in mind, when you are building your forests, I always find it amazing how
different a complex model like your own can look with an un-even global scaling
and/or additional color/brightness tint.
Doesnt take much. And minimises the number of different models required.

Keep up the amazing work...