In this chapter the, early Mesozoic land flora of the northern hemisphere is discussed briefly, and some of the subtle but significant evolutionary changes that took place during the time are summarized. Comments about climatic implications of the fossils are also included as well as comments about the environments of deposition of the fossils. Representative plant megafossils of the Early Mesozoic are illustrated. The Early Mesozoic as used here includes all of the Triassic and Jurassic Periods and the Neocomian Stage of the Cretaceous.