PREFACE. _ vil 
Professor Dewy, of Williamstown Coliege ; Professor Peck;.of 
_ Cambridge University ; the Hon. Jonathan Hunewell, of Bos- 
ton; Dr. Porter, of Plainfield; John Champneys, and N. Her- 
bemont, Esqrs. of South-Carolina; Mrs. Louisa C. Shaw, Capt. 
John Le Conte, John Cooper, John Watkins, and Thomas. 
Young, Esqrs. of Georgia; Dr. Hart, of Natchez; D. Rein- 
hardt,. and John D. Beatty, Esqrs.. of North-Carclina; Dr. 
Norton, and Dr. Hening, of Richmond; Dr. Thornton, of 
Washington; the Rev. Mr. Heckewelder, of Pennsylvania; 
Dr. Hulings, of Philadelphia; Dr. James, of Albany; Dr. Da- 
vid Hosack, Professor Mitchell, the Rev. Mr. Schaeffer, and 
Dr. Torrey, of New-York—from all whom seeds or plants have 
been received, which it would perhaps haye been impossible ta. 
have obtained from othér sources. « od 
