A STUDY OF WHEAT. 



II 



epidermis as it covers the vascular bundles or ridges found running 

 lengthways of the straw.' The larger cells, at C, are found covering 

 the grooves seen in the depressions in Fig. i between the vascular 



B A C - B 



FIG, 3. EPIDERMIS OF WHEAT STRAW. 



A, Rows of Stomates. B, Opposite, or over the Vascular Bundles seen at A, Fig. 1. 

 Drawn with Camera Lucida, X 75. 



bundles. At A, we find peculiarly modified cells surrounding open- 

 ings that are the regular breathing places, called stomates. The 

 wheat plant must be able to breathe, to exchange gases with the 



Same as Fig. 3, magnified more. 

 Camera Lucida, X 375. 



FIG. 4. EPIDE&MIS OF WHEAT STRAW. 



A, Stomates or Breathing Places. 



Drawn with 



