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, g; 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 xylem 
G 2 
