Many of the earlier determinations in the Juncacese 

 and Cyperaceae were made by Mr. Wm. Boott ; the later, 

 in the genus Cyperus, by Dr. N. L. Britton, of Columbia 

 College, New York; in the genus Carex, by Prof. L. 

 H. Bailey, Jr., of the Agricultural College at Lansing, 

 Michigan ; in the Graminese, from time to time, by Dr. 

 Geo. Vasey and Prof. F. Lamson Scribner, of the U. S. 

 Department of Agriculture, Washington, D. C. 



Thanks are specially due to Dr. C. W. Swan, of Boston, 

 who has put at the disposal of the authors his valuable 

 herbarium, his extensive acquaintance with the county 

 flora, and his personal services from the beginning to the 

 end of the flora. Without his critical labors upon the 

 Carices and Graminese, the catalogue could hardly have 

 been l-eady the present season . Thanks are due likewise to 

 W. H. Manning, Walter Deane, C. E. Faxon, Edwin 

 Faxon, Mrs. S. E. French, E. S. Hoar, Mrs. P. D. 

 Kichards, Dr. F. Nickerson, C. W. Jenks,H. A.Young, 

 William Edwards, Eev. J. H. Temple, Miss A. M. 

 Symmes, Miss Emily F. Fletcher, and others whose names 

 appear in the following pages. 



The catalogue does not claim to be exhaustive ; while 

 the Phanerogams, Vascular Cryptogams and marine 

 Algae are as complete, perhaps, as may be expected in any 

 list covering so much ground, many additions will 

 undoubtedly be made, more especially in the north-western 

 sections. The remaining Cryptogams are simply a con- 

 tribution for the benefit of special students. 



PLAN OF CATALOGUE. 



1. Names of plants thought to be indigenous have 

 teen printed in heavy, broad-face type. 



2. Names of introduced plants, propagating freely by 



