Ch. Ill, 9j SPECIAL FUXCTIOXS OF LEAVES 



lO 





Fig. 4?S. — The Pitcher Plant of Northeastern America. Sarracenia pur- 

 purea; X 5- 



The frontispiece, reduced, of Barton's Elements of Botany (2d ed., 1S04), 

 the first great .American botanical textbook. 



