LUTHER BURBANK 



plants that tend to produce uniformly, under the 

 right conditions of nourishment and care, flowers 

 of a far larger size than those of the ancestral 

 form. 



The matter of producing double flowers from a 

 single variety that is to say, flowers having two 

 or more rows of petals instead of a single row- 

 may present greater difficulties. Not, indeed, that 

 any new principle is involved, but merely that a 

 longer series of experiments may be required to 

 produce the coveted double flower. The start 

 must be made here just as in the other cases, by 

 searching among the hundreds or thousands of 

 plants for one that bears flowers having even a 

 single extra petal. 



Seed of this plant being sown, it is likely that 

 among the offspring there will be some that pro- 

 duce not merely one extra petal, but possibly two 

 or three. 



THE THREE REQUISITES 



Now you are on the road to success. Thence- 

 forward it is only a matter of time, skill, and 

 patience the three essential requisites of plant 

 development combined with the dealing with 

 large numbers of individuals. 



Exceptionally there may suddenly appear a 

 seedling producing flowers that are fully double. 

 In such a case, if the truth could be known, it 



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