BUD VARIATION IK THE WASHINGTON NAVEL ORANGE. 
25 
a large number of these typical Australian fruits. A further study 
of this orchard revealed several trees bearing all or nearly all Austra- 
lian fruits and having the peculiar upright habit of growth so charac- 
teristic of the trees of that strain. 
P530A-HP 
Fig. 7.— A Washington strain orange tree with a large limb sport of the Unproductive strain (shown at the 
right). 
An investigation of the occurrence of the single-fruit variations 
found in the Washington trees, as illustrated in Plate XV, revealed 
their occurrence in other trees as limb sports and in other cases as 
individual trees. A limb sport of the Unproductive strain occurring 
