78 



COMPOUND ORGANS OF PLANTS. 

 Fig. 32. 



Lycopodium clavatum. a. Scale of a spike "witii a capsule (magnified). 



103. The genus Lycopodium (Fig. 32), which forms the 

 type of this little family, appears to occupy an intermediate 

 position between the Ferns and the Blosses, and in some 

 respects seems to be allied to the Coniferse. 



104. It is in these plants that -vascular tissue first makes 

 its appearance in the form of woody and annular vessels, 

 which form a bundle in the centre of the stem, and which is 

 encompassed with cellular tissue ; from this vascular central 

 axis smaller bundles of woody tissue communicate with the 

 imbricated subulated leaves, which have an epidermis pierced 

 with true stomates, and are disposed spirally about the stem. 



105. The roots are still of a secondary character, that is. 



