1456. Mr. Henry Willey's " List of North American. Lichens," pub- 

 lished in 1878, contains 350 species and varieties growing in this dis- 

 trict, which if added to the foreiroino; makes a grand total ot 180B 

 plants whose names have been determined, 99 per cent, of which, or 

 all but about tifteen species, have been found within a radius of seven 

 or eight miles of City Hall. 



The Fungi and Algre, which are abundant and of great variety, have 

 not yet been investigated. 



In the determination of a number of the more difficult species, I 

 have consulted with Dr. Sereno Watson, of Harvard University, and 

 with James L. Bennett, Esq., Curator of Brown University. I should 

 also mention in this connection my valued friend, the late Thomas A. 

 Greene, whose knowledge of our Flora was of much benefit to me in 

 my earlier researches. 



Eliphalet Williams Hekvey. 



Neiv Bedford, Mass., May 1, 1891. 



