260 LUTHER BURBANK 



Nothing more is necessary in training the vine 

 than to trim it to form a head, and then from 

 time to time to cut out the straggling branches. 



The wistarias are difficult to hybridize, because 

 their flowers are papilionaceous, like those of the 

 peas and beans. But, with a little care, hand-pol- 

 lination may be effected, and some very striking 

 variations should be obtained in the second gen- 

 eration from a cross, for example, between the 

 American and Chinese wistarias. 



A complex hybrid between these and the 

 Japanese variety, Wistaria multijuga, which 

 produces astonishingly long racemes of flowers, 

 should give results of additional interest. 



My own experiments with the wistarias have 

 consisted of the growing of a great number of 

 seedlings, both of the Chinese and American 

 species, selecting among these for plants varying 

 in form, and bearing blossoms of different 

 size and colors. The results of these experi- 

 ments show that the wistaria is quite an 

 adaptable flower, and one that is certain to 

 repay more extensive breeding experiments, in 

 particular those that introduce the element of 

 hybridization. 



Only one other type of ornamental vine will be 

 mentioned here, the Lapageria, or Chilean Bell- 

 flower. 



