40 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 hardiness that would enable it to be 

 treated as an ordinary perennial, leaving the 

 roots in the ground and only dividing them now 

 and again for purposes of propagation. Still 

 this might require more work than is worth 

 giving to the task, inasmuch 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 worth working for. The same 

 is true of a pure white canna. By hybridizing 

 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 



