I was asked by a student to put the direction for how to make pine trees on the blog.
So here it goes. Sorry for the bad quality of photos I was holding the brush with one hand and the camera in the other.
First start by establishing where the ground is then by how tall you want the tree and put in vertical marks to indicate it.
Use a mixture of Ultramarine blue yellow and purple and a little burnt sienna for the basic tree color. Turn your brush horizontally and start by making very thin horizontal strokes and get a little larger as you go down the tree.
Establish where your light source is coming from and make that side in shadow. Then add yellow to the green mixture (not white) for the highlight side.
Turn your brush vertically and put in a few strokes for the trunk where it shows through the branches.
Go back and go over the trunk marks so they don't stand out too much.
Here is the finished tree.