VIU 



declines to have his own name inscribed upon the monu- 

 ment, however subordinately. Accordingly, it only re- 

 mains for the writer of this Preface to express — on the 

 part of the botanists who are to be benefited, and of 

 the Sullivant family, at wdiose expense this memorial 

 is published — most grateful acknowledgments to Mr. 

 Lesquereux for his valuable and essential services. 



It is thought proper to annex to this Preface the brief 

 Biographical Notice which constitutes the tribute paid 

 by the Council of the American Academy of Arts and 

 Sciences (in May, 1873) to the memory of its lamented 

 Associate. 



A. GRAY. 



Cambridge, Massachusetts, December, 1874. 



