CHAPTER IV 



THE ASCENDING SAP 



Now good digestion wait on appetite. SHAKESPEARE. 



IT has been pleasantly observed by one of our older physiologists that 

 the economy of the plant is analogous to that of a well-regulated 

 household. " The whole structure is composed of a number of different 

 organs or members having different parts to perform in the general 

 scheme ; and these parts or functions are so beautifully adjusted together 

 that, in every variety of circumstances in which the being is liable to be 

 placed, they shall still be executed in harmony and with one common 



Photo by] 



FIG. 124. HOP TREFOIL OB YELLOW CLOVER (Trifolium procumbens). 



Common in pastures and on roadsides. The pale yellow clusters consist of a number of flowers crowded together. 

 The downy stems will be found lying among the grass, etc., and often more than a foot in length. EUROPE 



N. AFRICA, N. ASIA. 

 92 



