tree ferns, as tall as our fir trees in northern latitudes; lepidodendra, with cylindrical forked stems, terminated by long leaves, and bristling with rough hairs like those of the cactus. “Wonderful, magnificent, splendid!” cried my uncle. “Here is the entire flora of the second period of the world—the transition period. These, humble garden plants with us, were tall trees in the early ages. Look, Axel, and admire it all. Never had botanist such a feast as this!”