418 



MESEOSEEE AND PALEOSERE. 



Fig. 44. — Relative distribution and probable phytogeny of the great groups 

 of plants during the vegetation eras. Slightly modified from Stopes. 



The composition of the Paleophytic land flora may best be indicated by the 

 following list: 



FILICALES. 

 COENOPTERIDEAE. 



Botryopteris TubicauUs Corynepteris 



Grammatopteris Zygopteris Ankyropteria 



MARATTIALES. 



Fsaronius 

 Sphenophyllum 



Calamites 

 Archeocalamites 



Caulopteris 



SPHENOPHYLLALES. 

 Cheirostrobus 

 EQUISETALES. 

 Calamostachys 



Pseudobomia 

 Palaeostachys 



LYCOPODIALES. 



Lycopodites SelagineUites Miadesmia 



Lepidodendron Lepidostrobua Lepidocarpon 



Bothrodendron Sigillaria Spencerites 



PTERIDOSPERMAE (CYCAD0FILICE8). 



LYGINODENDREAE. 



Lyginodendron Heterangium 



NEUROPTERIDEAE. 

 NeuTopteris Linopteris Lonchopteris 



Alethopteris 



GYMNOSPERMAE. 



CORDAITALES. 

 Cordaites Cardiocarpus 



GINKGOALES. 

 Ginkgo Baiera 



