Hybridization 



133 



and known, among our fruits and vegetables. In grapes 

 there are the most. There are Rogers' hybrids, as the 

 Agawam, Lindley, Wilder, Salem, and Barry; and there 

 is some reason for supposing that the Delaware, Catawba, 

 and other varieties are of hybrid origin. And many 

 hybrids have come to notice lately through the work of 



FIG. 37. Hybrid tangelo and its parents/pomelo and tangerine. 



Munson and others. But it must be remembered that 

 grapes are naturally exceedingly variable, and the specific 

 limits are not well known, and that hybridization among 

 them lacks much of that defmiteness which ordinarily 

 attaches to the subject. In oranges, hybrid citranges and 

 tangelos made by Webber and Swingle are now reaching 

 considerable commercial importance (Figs. 36-39). In 



