4 BULLETIN 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-known 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. 
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 
