ILLUSTRATION No. la. 



8 





Transverse section of one of the string-like bundles of sap conducting tissues of the stem 



X 110 diameters. 



A = Xylem vessels. There conduct salt sohitions absorbed from the soil by the roots to 

 tho leaves. 



B = Phloem tissue. This tissue conducts the foods elaborated by the leaves back to the 

 various parts of the plant. There is only a small patch of phloem tissue. In tho 

 illustration it is about one centimetre in diameter. The arrow points to the centre 

 of it. Its comparatively thin walls give it a distinctive appearance here. 

 The remainder of the bundle consists of sclerenchymatous tissue which gives great 

 strength to it. 



