Cycads and Other Gymnosperms

100 tree stumps in an area of about 3,900 m. The diameters of these trunks range from 13 to 61 cm and the largest tree had 86 growth rings. The bedding plane around the trees in this forest is littered with Dicroidium which probably grew on these trees. The only other forest of petrified trees in Antarctica occurs in the Early Cretaceous rocks of Alexander Island (71°00 S, 70°00 W) located off the coast of western Palmer Land on the Antarctic Peninsula (Jefferson 1982). 

Jefferson and Taylor (1983), Taylor and Smoot (1983), and Taylor et al. (1983) reported that the cells 

Even more important to the advancement of botany is evidence which suggests that seed ferns may be the missing link between the gymnosperms and the angiosperms. The critical evidence takes the form of a small seed-bearing capsule in the silicifled peat at 

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