4 BULLETIlSr 813, U. S. DEPARTMENT OF AGRICULTURE. 



the striking variability of Eureka lemon trees in a neighboring orchard 

 was discovered. This orchard consisted of about 16,000 trees which 

 were six years old at that time. The buds from which the trees had 

 been propagated were obtained from a well-kno-wn productive 

 Eureka orchard in the same locality. The buds were procured in the 

 customary way, two men having been sent to cut them with no 

 thought of selection from superior individual trees. 



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Fig. 1.— a typical lemon tree of the Eureka strain, 10 years planted. All of its branches are bearing 

 flowers or fruits in various stages of development. 



The usual habit of growth of the productive Eureka trees under 

 observation was open and somewhat drooping (fig. 1), and the trees 

 had medium-sized leaves which were oval and rounded in shape. 

 The fruitful trees were bearing heavy crops of fruit during June, 1911, 

 and every branch was apparently carrying blossoms and lemons in 

 varying stages of development. - 



However, here and there trees were observed having a very different 

 habit of growth and condition of fruitfulness. These trees had a 

 spreading habit of growth with large and sharply pointed leaves and 



