xiv] 



LYCOPODIUM 



45 



and the line of dehiscence is determined in some species at 

 least by the occurrence of smaller cells in the wall. In 



Fig. 126. A. Lycopodium cernuum, longitudinal section of strobilus ; a, band 

 of lignified cells. 



B. L. cernuum. Cell from sporangium wall. 



C. L. cernuum. Sporophyll and sporangium ; It, vascular bundle. 



D. L. clavatum. Part of radial longitudinal section of strobilus ; 



p, sterile tissue. 



E. L. Phlegmaria. Sporophyll and stalked sporangium. 



P. L. clavatum. Transverse section of strobilus; p, sterile pad. 



transverse sections of cones in which the sporangia are strongly 

 saddle-shaped, the sporophylls may appear to bear two sporangia. 



