THE SEEDLING AND YOUNG- PLANT 



83 



there are in ordinary well-water. This extremely 

 dilute solution passes into the root-fibres and up 



FIG. 23. A. A small piece of the lower epidermis removed 

 (and highly magnified) to show the stomata,^ ; h, minute 

 hairs. The guard-cells contain chlorophyll corpuscles, 

 whereas the ordinary epidermal cells do not. B. A stoma 

 in vertical median section, cut across its longer axis ; a, 

 intercellular space ; g, guard-cell with chlorophyll cor- 

 puscles ; s, orifice of stoma. 



through the vessels, &c., of the vascular bundles of the 

 roots, collecting into the larger and larger channels 

 until it reaches the stem ; here it passes up the xylern 



G 2 



