70 



ELEMENTARY BOTANY. 



type of strands, that from the monocotyledonous stems (Fig. 

 104), there are two kinds of tissue, 

 namely, the wood and the bast. These -^*'* 

 are shown in Fig. 105. In the other 

 type, that from the dicotyledonous 



strand 



Pith 



Wood 



Fig. 104. 



Fig. 105. 



stems, the strand consists of wood, cambium, and bast (Figs. 

 106 and 109). The cambium cells are thin-walled, rich in 



strand 



Epidermis 



Oamtjium 







Cortex 



Pith 



Fig. 106. 



Fig. 107. 



protoplasm and capable of division. If microscopic sections 

 are not available, an inspection of the figures given may 

 convey a general idea of the structure of the strands and 

 the development of the woody stems and tissue of the tree 

 trunks. 



