APPENDIX VII 



LACK OF WINTER DORMANCY AND THE LOW ZERO POINT OF 



GROWTH OF THE LYCHEE LIMITING FACTORS IN ITS 



CULTURE IN FLORIDA. 



By WALTER T. SWINGLE 

 United States Department of Agriculture 



Canton, China, is in the same latitude as Havana, Cuba. 

 Coconut palms abound in Cuba and also in southern Florida, but 

 the visitor to Canton looks in vain for them. The coconut palms 

 grow in numbers on the shores of Lake Worth, Florida, in latitude 

 26 45', just three and one-half degrees north of Havana. 



The lychee has not as yet been grown successfully without 

 protection in any part of Florida; and yet it is grown commerically 

 in the southern part of Fukien Province, especially about Hsinghwa 

 Fu (now P'ut'ien Hsien), two degrees north of Canton. I passed 

 through Canton late in January, 1919, and found the weather 

 cloudy and distinctly chilly. I was told that there had been prac- 

 tically no sunshine for a month. To my surprise, the lychee trees 

 growing on the dykes on the Canton Christian College grounds 

 on Honan Island showed a beautiful wine-colored flush of new 

 growth. The daily meteorological records of the Freeman Mete- 

 orological Observatory at the Canton Christian College for January, 

 1919, give the following record of temperature and humidity: 



153 



