AN 



TO THE STUDY OF 



BOTANY 



INCLUDING A TREATISE ON 



* 



VEGETABLE PHYSIOLOGY 



AND 



DESCRIPTIONS OF THE MOST COMMON PLANTS 



IN THE 



MIDDLE AND NORTHERN STATES. 



BY 3. L. COMSTOCK, M. D. 



AUTHOR OF "MINERALOGY," " NATURAL PHILOSOPHY," " CKEMISTKV." 

 "GEOLOGY." "PHYSIOLOGY, etc 



THIRTY-SECOND EDITION. 



NEW YORK: 



PRATT, WOODFORD, FARMER & BRACE, 



NO. 4 CORTLANDT STREET. 



1856. 



