THE EPIDERMIS. 



15 



The cells of the epidermis 

 adapted to dry, hot climates 

 are very thick, and tlie cells 

 of those adapted only to 

 moist air are thin, while the 

 cells of the same species may 



vary much in thickness, de- glaum Uluieirs fescue); a, from a plant grown 



, . J. 1 '" ^''^^ wliade with plenty of moisture; />. from a 



pending on a crreater or less plant grown in greater heat, with much light 



^ ° ° and little moisture. 1 x ISO.— (E. Hackel). 



exposure to light, heat, and moisture. 



Pio. 16.— This gives some notion 

 (June grass); a, cross section 

 uermal libers; d. rows of stomata 

 worth). 



