THE TRIFOLIATE ORANGE. 



was again taken up in 1896-97 and vigorously pushed. 

 Their work resulted in the production of upwards of two 

 thousand hybrids and a number of these have proved to 

 possess the desired hardiness. 



Many of the varieties have been fruited for the De- 

 partment of Agriculture by the Glen Saint Mary Nurseries 

 in northern Florida and by different Experiment Stations 

 in the Southern States. It has been clearly demonstrated 

 that the hardy varieties will stand, uninjured, tempera- 

 tures which would prove fatal 

 to ordinary oranges. The work 

 has now progressed so far that 

 something definite can be said 

 concerning the quality of the 

 fruit and some estimation can 

 be placed on the work from the 

 standpoint of future and fur- 

 ther developments. 



Everything pointed to Citrus 

 trifoliata as the parent which 

 would impart the desired hardi- 

 ness. With this as the female 

 parent (in most cases) the work 

 was undertaken. Crossing was 

 not as easily performed as 

 might be expected. Only about 

 two per cent, of the fruit set 

 and many of these produced a 

 considerable amount of defect- 

 ive seed. A large number of the 

 plants produced cannot be dis- 

 tinguished from the trifoliate 

 orange, others are exactly like 

 sweet orange seedlings, while 



Fisr - 7 - 



