ADIAXTUM PEDATUM. HQ 



a. The very irregular shape of the cells and the way 

 in which they dovetail into each other. 



b. Here and there narrow slit-like stomata, each 

 bounded by two crescentic cells, the guard cells. 



c. Along certain lines (over the veins) the different 

 shape of the cells. 



J. The chlorophyll bodies, especially in the guard cells ; 

 their granular nature. 



e. Make a drawing showing these points. 



/. Examine in the same way the epidermis of the 

 upper surface of a leaflet ; note the absence of 

 stomata. 



Cut a vertical section of a leaflet at right angles to the 

 veins. Observe 



g. On each side of the section the irregular epider- 

 mis, containing chlorophyll bodies. On a draw- 

 ing of the surface view of the epidermis draw 

 imaginary lines in various directions and note 

 the differing lengths of the lines across any cell. 

 This will explain the different lengths of the epi- 

 dermal cells cut by the razor. 



//. Occasionally a stoma in the epidermis, bounded 

 by the two guard cells, communicating with an 

 intercellular space ; note the shape of the guard 

 cells. 



2. Occupying the space between the upper and lower epi- 

 dermis, the loosely arranged irregular parenchyma of 



* the leaf, mesophyll, also containing chlorophyll. 



3. The large intercellular spaces of the parenchyma. 



4. At intervals along the section the cut ends of the reins. 

 Identify the tissues with those seen in the stem. 



5. Beneath the vein, forming a part of the lower surface 



