PREFACK. XI 



its intended limits. Wc would therefore, at present, briefly 

 state, that wc arc indebted to the following persons,, to many of 

 them very largely, for the plants of particular districts, accom- 

 panied in many instances by valuable notes and observations, 

 viz : 



To Prof. BiGELow, Mr. B. D. Greene, and Mr. Edward 

 TucKERMAN, Jr. of Bostou, Mr. Oakes of Ipswich, Dr. Jacob 

 Porter of Plainficld, and Mr. T. A. Green of New-Bedford, 

 Massachusetts, Prof. Hitchcock of Amherst College, as well as 

 to Prof. Emmons, late of Williams College, and Prof. Dewey, late 

 of Pittsfield, Massachusetts, for plants from various portions of 

 that state as well as of Maine and New-Hampshire. 



To Dr. Barratt of Middletown, Connecticut, for the plants 

 of that neighborhood, and also from the White Mountains of 

 New Hampshire, &c. : also to Prof. Tully, of Yale College, 

 for some interesting plants. 



For plants of the State of New York, to Dr. Stevenson of 

 Cambridge, Washington County, Dr. Bradley of Monroe Coun- 

 ty, Dr. H. P. Sartwell of Penn Yan, Yates County, Mr. David 

 Thomas of Cayuga County, Dr. Crawe of Jefferson County, Dr. 

 AiKiN formerly of Troy, Prof. Lewis C. Beck formerly of Al- 

 bany, Mr. A. J. Downing of Newburgh, Prof. Bailey of West 

 Point Military Academy, and to Mr. Wm. Cooper, Mr. Abraham 

 Halsey, Prof. Eaton, Mr. R. J. Brownne, and Mr. John Carey, 

 of New York ; many of whom have also furnished us with 

 plants from different portions of the United States. 



For those of Pennsylvania and New Jersey, &c. our chief 

 contributors are Dr. Pickering and Mr. Durand of Philadelphia, 

 and Dr. Darlington of West Chester, Pennsylvania. From 

 Virginia, a small collection has been received from the Rev. Prof. 

 Ruffner. 



For plants from North Carolina we are chiefly indebted to 

 the Rev. Mr. M. O. Curtis, to the late Mr. Von Schweinitz^ 

 from whom we also received many plants from other parts of 

 the United States, and to the late Mr. Croom, who also made 

 very interesting collections in Florida. 



From South Carolina and Georgia we have received interest- 



