GRAY'S BOTANICAL TEXT-BOOK. 



(SIXTH EDITION.) 



VOL. I. 



STRUCTURAL BOTANY, 



OK 



ORGANOGRAPHY ON THE BASIS OF 



MORPHOLOGY. 



TO WHICH IS ADDED THE PRINCIPLES OF 



TAXONOMY AND PHYTOGRAPHY, 



AND 



| 



of botanical Ccrm0. 



BY 



ASA GRAY, LL.D., ETC., 



FISHER PROFESSOR OF NATURAL HISTORY (BOTANY) IN 

 HARVARD UNIVERSITY. 



NEW YORK : CINCINNATI : CHICAGO 



AMERICAN BOOK COMPANY 



