Reproduced by means of spores . Requires moist habitat. Continued and thrived in Carboniferous. Lepidodendron Note leaf scars on the trunk. The large lycopod trees became extinct by the end of the Paleozoic.
Plant roots begin to stabilize the soil against erosion.
Seed-bearing plants appeared. Seed-bearing plants no longer require moist habitats. Expansion of plants into drier areas. Mass extinction just before the end of the Devonian. Photographs were taken in the Denver Museum of Natural History.