THE 



BOTANICAL TEXT-BOOK, 



AN 



INTRODUCTION TO SCIENTIFIC BOTANY, 



BOTH STRUCTURAL AND SYSTEMATIC. 



FOR COLLEGES, SCHOOLS, AND PRIVATE STUDENTS. 



THIRD EDITION, 



REWRITTEN AND ENLARGED. 



iwtf) ttoefoe fctmfcreb (Jngrabingf? on 2Boot>. 



BY ASA GRAY, M. D., 



FISHER PROFESSOR OF NATURAL HISTORY IN HARVARD UNIVERSITY. 



NEW YORK: 



GEORGE P. PUTNAM. 



1850. 



LIBRARY 



UNIVERSITY OF CALIFORNIA 



