2 GENEKAL INTEODDCTION. 



the study of the internal structure of plants is called 

 Histological Botany ; that department which investigates 

 the living processes of plants is called Physiological Botany ; 

 and that department which considers plants as to their 

 lands and relationships is called Systematic Botany. 



Fig. 2. 



Fig. 2. — Sakura (Frunus pseudo-cerasusj. 



