中生代植物界总体面貌 蕨类植物(羊齿) 孢子植物 裸子植物 First flower in the Seedless plants Gymnosperms world,K1,辽宁 CENOZOIC o Cretaceous Jurassic tRiassic Permian g Pennsylvanian W Mississippian 8 eonian Silurian 最早的被子植物 Figure 14-12 Geologic ranges and relative abu sundance of land plants. Among the seedless vascular plants and gym- elements in the modern flora. Flowering plants, the angio- sperms, appeared during the Cretaceous and now account nosperms, only ferns and conifers, respectively, are common or more than 90 percent of all land- plant species中生代植物界总体面貌 孢子植物 裸子植物 蕨类植物(羊齿) First flower in the world, K1, 辽宁 最早的被子植物