BIOLOGY 

 LIBRARY 



PREFACE TO THE EDITIONS OF 1869. 



IN the present edition the Flora has been extensively revised, 

 and numerous changes have been made, in accordance with recent 

 discoveries and the general progress of the science of Phytology. 

 These changes consist especially of the addition of species hitherto 

 unknown to our Flora, of new and corrected names for the old 

 species, of new localities of species and corrected dates of flower- 

 ing. In these improvements we have received valuable aid from 

 Mr. E. L. Hankenson, of Newark, Wayne Co., N". Y. ; Messrs. W. 

 E. Gerard, and G. M. Wilbur, of Poughkeepsie, N. Y., Mr J. Wolf, 

 Canton, Fulton Co., 111., and others whose names appear in the 

 proper place. 



BOTANICAL APPAKATUS. 



The publishers (Messrs. A. S. Barnes & Co.) have recently pro- 

 vided and have on sale, suitable apparatus for the use of the 

 student in Botany, made according to directions in this work 

 (page 15). It consists of a 'knife-trowel for digging and cutting 

 specimens ; a microscope and tiveezers for the examination of them ; 

 a tin-box for collecting and preserving them fresh, and a press for 

 drying them. The set is securely packed and sent by express to 

 order, at a moderate price. 



IN PEESS, 



and will be published during the ensuing summer, The Botanical 

 Index, a text-book for schools altogether new and peculiar, in 

 which the study of the plants of the whole country is reduced to 

 the last degree of precision and dispatch. Its use will lighten the 

 labors of the teacher and add still new pleasures to botanical 

 studies. 



Entered, according to Act of Congress, in the year 1869, by 



A. S. BAENES & Co., 

 In the Clerk's Office of the District Court for the Southern District of New York. 



Electrotyped by Printed by 



SMiTir&McDouoAL, GEOKGEW. WOOD, 



82 & 84 Beekman St. 2 Dutch S*t., N. Y. 



