PREFACE. xi 



York, for the Cliara<ru>; and to Prof. T. 0. Porter, of Easton, 

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

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

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

 Leggett, of New York ; Mr. R. W. Brown, of Keyport, and 

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

 on the Flora of different sections of the State. 



N. L. BRITTON. 



