LUTHER BURBANK 



include hardiness, the production of a double 

 flower, and the production of a white flower, 

 among others. 



In California the canna may be left out of doors 

 over winter; indeed it does much better when so 

 treated than when the bulbs are lifted and stored. 

 In the northeastern States, it is necessary to dig 

 the roots and store them where they will not be 

 subject to too low a temperature. It will be of 

 advantage to develop the canna to a stage of hardi- 

 ness that would enable it to be treated as an ordi- 

 nary perennial, leaving the roots in the ground 

 and only dividing them now and again for pur- 

 poses of propagation. Still this might require 

 more work than is worth giving to the task, inas- 

 much as the canna is already grown far to the 

 north, and the work of digging and storing the 

 bulbs is not excessive. 



A double canna would certainly be a novelty 

 and one that is probably worth working for. The 

 same is true of a pure white canna. By hybridiz- 

 ing and careful selection, it should be possible to 

 develop this novelty, judging from analogy with 

 other flowers. Of course it is possible to increase 

 the size of the flower, and to produce other color 

 variations along the line of recent developments. 

 Most important of all, the flower should be made 

 more lasting. 



[244] 



