saddle tree

saddle tree (plural saddle trees)

1. The base on which the rest of the saddle is built. Usually based on wood or a similar synthetic material, it is eventually covered in leather or a leatherlike synthetic. The tree size determines its fit on the horse's back as well as the size of the seat for the rider.
2. The tulip tree.

• saddlebow

• tree (structurally)

• mochila