6o6 



AIOSSES AND FERNS 



CHAP. 



To summarise briefly : the conclusion reached is that the 

 Spermatophytes represent not one single line of development, 

 but at least two, and perhaps more, entirely independent ones, 

 having their origin from widely separated stocks. The Gymno- 

 sperms (at least the Conifers) are probably direct descendants 

 of some group of Lycopods allied to the Selaginellaceae, or 

 Lepidodendracese, while the origin of the Cyads and Angio- 

 sperms is to be looked for among the eusporangiate Filicineae. 



Angiospermce 



Coni feres 



l^arsiliacear 



Sphagna I 



Salviniacecr 



