It had a woody stem and simple leaves. Cycadeoids are now extinct but there are still a few cycads. Cycadophytes dominated southern areas during the Triassic period and thrived during the Jurassic, but began to decline in the mid-Cretaceous period. Cycadeoids went extinct. Gingkos peaked during the Jurassic and Cretaceous periods.
Gingkos are still around today.
Pteridophytes evolved during the Devonian and were mostly low-growing during the Mesozoic Era . This group included Glossopteris, Dicroidium, Caytonia, Denkania, and Lidgettonia. Seed ferns dominated southern Pangaea during the Triassic period. Seed ferns went extinct during early in the Cretaceous period. Glossopterids went extinct at the end of the Triassic period.