145 to 100 million years ago. Matching flora to our series "Saurian struggle" (100/58). Matonidium, Cycadeoidea, Nilssonie, Onychiopsis, Ginkgo, Conifer. In the Lower Cretaceous, lycopods, ferns (low and high), ginkgos and conifers were the dominant plants. Coal seams also date from this period. During the Cretaceous, the first shrubby flowering plants and deciduous woody plants developed.