PREFACE. XI 



Y< >rk, for the Characea? ; and to Prof. T. C. Porter, of Easton, 

 Penua. ; Prof. Samuel Lockwood, of Freehold ; Dr. O. R. Willis, 

 of White Plains, New York ; Messrs. W. 11 Wolfe and H. 

 H. Rusby, of the Xorth Jersey Botanical Club ; Mr. W. H. 

 Leggett, of Xew York ; Mr. R. W. Brown, of Kevport, and 

 Mr. Frank Tweedy, of Plainfield, for manuscript lists and notes 

 on the Flora of different sections of the State. 



X. L. BRITTON. 



