HoLLOWAY. — Studies in the New Zealand Species of Lycopodium. 281 



toxylin than those nearer the surface, owing to the presence in them 

 of fairly abundant cell-contents. Each protophyll possesses a simple 

 vascular strand, which penetrates into the upper region of the rhizome, 



Fig. 71. — Lycopodium laterale. Longitudinal section of fully grown protocormous 

 rhizome, showing young stem-apex and course of vascular strand. X 25. 



and there ends blindly (fig. 70). A transverse section of a fully grown 

 rhizome, such as is shown in fig. 70, shows a well-marked groove running 

 ventrally along the length of the rhizome. This is probably a conse- 



PiG. 73. — Lycopodium laterale. Longitudinal section of fully grown protocormous 

 rhizome, showing initiation of first root. X 25. 



quence of the fact that the body of the rhizome is formed by the swollen 

 bases of the two I'ows of its protophylls. The stem-axis is initiated 

 eventually at some point on the dorsal surface, and is marked by the 



