Found by Valhalla of Morningthaw: I found a "Tree" in the desert, it looked like a pile of rocks, and its description read "A rock". below is the message I received when handing the "Tree" to the Stone Craftsman. You allow Stone Craftsman to examine your Tree. You hand over 1 of your Trees. Stone Craftsman tells you, "Thank you human, this will do nicely. Before long we'll have this place filled with little benches to sit on."