94 THE WHEAT PLANT 



bands frequently run in pairs, which sometimes coalesce to form broader 

 C 



FIG. 73. Transverse section of hypoderm and vascular bundle (x38o). 

 c, Bands of chlorophyllous tissue. 



ones. Each band is wide at the apex and tapers gradually as it is traced 



FIG. 74. Transverse section of large vascular bundle ( x 260). 



downwards ; beneath the leaf-sheath it diminishes rapidly, and finally 

 disappears before it reaches the base of an internode. 



The average width and thickness of each individual band is greatest 



