52 



LYCOPODIALES 



[CH. 



Pig. 131. A. 



B. 

 C. 



D. 



E. 



F. 

 G. 



Selaginella Willdenowii, Transverse section of stem : a, outer 

 cortex ; p, phloem ; t, trabeculae. 



S. spinosa, stem: px, protoxylem. 



8. laevigata var. Lyallii, section of stele: f, ridge of xylem 

 cylinder; e, endodermis. 



S. rupestris, seedlings with cotyledons (c) protruding beyond the 

 sporophylls (b). 



Transverse section of Selaginella leaf-base : I, ligule ; It, leaf- 

 trace. 



Portion of G. enlarged. 



S. grandis. Longitudinal section of strobilus : 66, sporophyll- 

 trace; I, ligule. 



(A, B, C, E, P, after Harvey-Gibson; D, after Miss Lyon.) 



