What trees did the stegosaurus eat?

Stegosaurus was an herbivore, or plant eater. They probably ate mosses, ferns, horsetails, cycads and conifers, but whatever they ate had to be within three feet of the ground, unless they were able to stand on their hind legs. A study of the bite force and teeth of Stegosaurus suggests that they couldn't bite through sticks that were more than 1.2 centimeters thick, so they would have needed to eat very tender vegetation.