THE NATURE AND WORK 

 OF PLANTS 



An Introduction to the Study of Botany 



BY 



DANIEL TREMBLY MACDOUGAL, PH.D. 



DIRECTOR OF THE LABORATORIES, NEW YORK 

 BOTANICAL GARDEN 



THE MACMILLAN COMPANY I 



LONDON : MACMILLAN & CO., LTD. ^ ;> 



1909 t Vl 



All rights reserved 



