PREFACE TO THE REVISED EDITION. 



IN the present edition the Flora has been extensively revised, and nu- 

 merous 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 cor- 

 rected dates of flowering. In these improvements we have received valuable 

 aid from Mr. E. L. Hankenson, of Newark, Wayne Co., N. Y., Messrs. W. R. 

 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 APPARATUS. 



The publishers (Messrs. A. S. Barnes & Co.) have recently provided 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 tweezers for the exami- 

 nation 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. 



WOOD'S BOTANICAL SERIES. 



I. OBJKCT LESSONS IN BOTANY, $1.8O 



Pleasing lessons for young learners. 



II. BOTANIST AND FLORIST, . 2.5O 



A thorough text-book, comprehensive and practical. 



III. THE NEW CLASS-BOOK, 3.SO 



A superb and exhaustive compilation and encyclopedia of the science. 



IV. THE STUDENT'S PLANT RECORD, .... O.7S 



A book of blank forms, facilitating the analysis of plants, and recording 

 the results of such analysis, and the progress of the student. 



Entered according to Act of Congress, in the year 18C9, by 



A. S. BARNES & C O . , 



In the Clerk's Office of the District Court of the United States for the Southern 

 District of New York. 



