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4 
Vili. PREFACE,. 
It is also well where the orders are small, to unite those o 
several neighbours in one, which will both abridge the trouble of 
execution and the expenses of transportation. 
I cannot conclude my prefatory remarks without acknowledging 
my obligations to a number of gentlemen for their polite contribu- 
tions to this establishment, especially to Professor Thouin, Adminis- 
trator of the Royal Gardens at Paris; to Professor Bosc, Inspector 
of the King’s Garden at the Luxembourg, Paris; to F. J. Laine, of. 
Switzerland; to Octavien Targioni Tozzetti, Professor of Botany 
and Agriculture at Florence, Italy; William H. Krause, Esq. of the 
island of St. Croix; Howard Marsh & Co. of the Island of Madeira; 
Thomas Nuttall, Esq. Professor of Botany, and author of the “‘ Gen- 
era of American Plants ;” Professor Dewy, of Williamstown College; 
' Professor Peck, of Cambridge University ; the Hon. Jonathan Hune- 
well, and the Hon. John Lowell, of Boston; Dr. Porter, of Plainfield ; 
John Champneys,.and N. Herbemont, Esqrs. and Mrs. Eliza C. 
Cochran, of SouthCarolina; Mrs Louisa C. Shaw, Thomas Young, 
Esq. Capt. John Le Conte, Lewis Le Conte, John Cooper, John Wat- 
kins, and A. G. Olmeer, Esqrs. of Georgia; George Gibbs, Esq. of 
Florida; Dr. Hart, of Missouri; Robert B. Currey, Esq. of Tennes- 
see; Robert W. Brown, William B. Meares, D. Reinhardt, and 
John D. Beatty, Esqrs. of North-Caralina; Dr. Norton, and Dr Hen- 
ing, James Heron, Thomas H Mitchell, and Thomas Balls, Esqrs. 
of Virginia; Dr. Thornton, of Washington; the Rev. Mr. Hecke- 
welder, Dr. Hulings, Dr. James Mease, Henry Pratt, Reuben Haines, 
and Philip H. Mattes, Esqrs. of Pennsylvania; Joseph Barratt, Esq. of 
Vermont; Zecharish Allen, Esq. of Providence; John Stevens, Esq. 
of New-Jersey; Dr. James, of Albany; James G: Tracy, Esq. of 
Niagara county ; Dr. John Torrey, Professor of Botany, &c. at West- 
Point, and author of the “ Flora of the Northern and Middle States ;*” 
the learned Professor Mitchell, Dr. David Hosack, Rev. Mr Schaef- 
fer, G.G. Howland, John Aspinwail, Esqrs. and Capt. Jacob Smith, 
of New-York; Col. George Gibbs, of Sunswick, Ur. Vandervere, of 
Fiatbush, Henry Pope, Esq. of Brooklyn, and Capt. Ebbets of New- 
town, Long-Island—by all of whom seeds or plants have been politely 
contributed, which it would perhaps have been impossible to have 
ebtained from other sources, 
7 
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