23G 



LYCOPODIALES 



[CH. 



branches was in direct continuity with that of the Stigmarian 

 rhizomes. 



The next stage is that in which the undifferentiated bulb 

 becomes swollen at the base and developes four primary roots 

 (fig. 207 B, C) which grow obliquely downwards and produce 

 numerous rootlets. Meanwhile the parent rhizome gradually 

 decays, finally setting free the aerial stems which are now 

 provided with spreading and forked roots (fig. 208) such as we 



' Iftiill 



Fio. 208. 



Fig. 207. 



Fio. 207. An early stage in the development of Sigillaria. 



A. Surface-features enlarged. (After Grand'Eury.) 

 Fig. 208. Later stage in the development of Sigillaria ; Syringodendron with 



Sligmariopsis. (After Grand'Eury.) 



are familiar with in English specimens as Stigmaria ficoides, 

 but which in the French specimens show the features of Stig- 

 mariopsis. At this later stage conical outgrowths are formed 

 from the under surface of the Stigmariopsis arranged in a 

 more or less regular series surrounding the centre of the forked 

 and spreading roots (fig. 209). These conical and positively 

 geotropic organs were long ago described by Richard Brown as 



