THE LYCHKK AND LUNGAN 



The writer desires to express his appreciation for valuable 

 assistance in the field to his many Chinese students and friends, with- 

 out whose help the work would have been very difficult. To the 

 many Chinese orchardists whom I have interviewed and to the 

 Chinese nurserymen in whose homes I have been entertained a wish 

 is expressed that Chinese investigators and students may have as 

 cordial treatment in the hands of the western public. To Dr. David 

 Fairchild and his staff in the Office of Foreign Seed and Plant In- 

 troduction of the United States Department of Agriculture the writer 

 is indebted for access to information whereby he could better under- 

 stand the real problems involved in the introduction of these fruits 

 into the United States; especially to the late Mr. S. C. Stuntz for his 

 valuable suggestions and corrections in the preparation of the original 

 manuscript. Special obligation is expressed to Dr. and Mrs. Walter 

 T, Swingle for encouragement and their untiring efforts to assist in a 

 thorough study of the European and Chinese literature and in a more 

 complete understanding of some of the vital phases of the work. Dr. 

 Swingle made many valuable suggestions with regard to the possibili- 

 ties in the use of other species of the " lychee group " for hybridizing 

 and stock. Thanks is due Dr. S. W. Fletcher, Professor of 

 Horticulture at the Pennsylvania State College for encouragement in 

 the study and for reading the original manuscipt; and to Prof. I. L. 

 Foster, Professor of Romance Languages, for translation of some of 

 the European literature. In the study of the Chinese literature the 

 writer is indebted for the assistance of one of his old students, Mr,. 

 Li Ch'eng Lan (Li Ch'ing Lan, 3* $ $!j) and to Mr. Kuo Hua 

 Ssin ( Kwok Wa Sau ||J ^ ^ ) for assistance in checking investigations. 

 To Mr. Michael J. Hagerty of the Office of Crop Physiology of the 

 United States Department of Agriculture acknowledgement is due for 

 a translation of Ts'ai Hsiang's Li Chili P'ir, and to Mr. Ho Hung 

 P'ing (fpj && 2 p) of the Canton Christian College for a translation of 

 Wu Ying K'uei's Ling Nan Li Chili P'u, 



In 1917 it was an agreeable surprise to return from China to 

 the United States and to find in the Library of Congress at Washing- 

 ton an excellent collection of Chinese works, with a system of 

 classification facilitating ready reference. It is no exaggeration to say 

 that this work, in its present form, would not have been possible 

 without reference to these valuable works whereby the writer has 

 been able to check original investigations in his own region and to 



