GLIMPSES INTO PLANT STRUCTURE 43 



are not scattered about, but arranged around a cen- 

 tral pith, each bundle separated from its neighbour 



Fig. 28. Slice or section of a twig from the S) camore-tree. 

 Actual diameter -fa of an inch 



by a ray from the central pith portion. These fea- 

 tures of the stem are generally associated with 



