GLIMPSES INTO PLANT STRUCTURE 43 



are not scattered about, but arranged around a cen- 

 tral pith, each bundle separated from its neighb 



our 



Fig. 28. Slice or section of a twig IVoni tlie s)caniore-tree. 

 Actual diameter /^ of an inch 



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

 tures of the stem are generally associated with 



