The core of each tree is made from a branching section of twig. On the left, you see a tree whose foliage is made from a mass of moss, found on the ground in a park. Amazingly enough, this is still green after several years. I store it in a dark box.

On the right, you see a tree the foliage of which is rubberised lichen, sold in most model shops (though not tremendously cheaply). Stick the lichen on the tree and hey presto!

Pine trees Oak trees Palm trees Cypress trees Orchard trees Dead/winter trees Tree stumps Trees made from nails