Tree help

[shanehowlett]

This is a small (like a 30 mile diameter area of a 300 square mile area, that makes up 10% of the map that roughly detailed.) spot of the over-world map i am attempting to draw. The only issue is that I'm attempting to do it in a somewhat isometric view, and my trees are an epic fail. Any advice anyone could give me on drawing isometric trees of all kinds. I'll be using Icons for the places of importance but the landscape will feature Mountain areas and valleys, every type of tree, Glacial areas, Plains areas, Deserts, large bodies of water. Since the world is extremely exaggerated there really isn't a need for realism. Therefore any advice would be welcomed, especially constructive criticisms.

Thank you.