Between a busy semester-end week and waiting for paint to dry a bit more, I'm finally getting to do more on this landscape today.
If you look closely, you can see some subtle color added to the farthest tree line. Then grayer tree trunks for further trees and finally the trunks of nearer trees.
I'm not working from any 1 reference picture, but from a variety of references. So I'm constructing the shape of the trees as I go. They have a rather upright habit. Perhaps most like elm trees.
Next- more waiting for paint to dry! Then some scant foliage and the foreground!