BUD VARIATION IN THE WASHINGTON NAVEL ORANGE. 27 
MINOR VARIATIONS OF FRUITS. 
In addition to the widely different strains of the Washington Navel 
orange discovered in these investigations, many other less striking 
variations have been observed. The full significance and importance 
of these minor variations are not fully understood as yet, so that no 
extended discussion of their occurrence will be given at this time. 
Among these variations are those similar to fruit chimeras, an 
example of which is shown in Plate XVII, figures 1 and 2. In some 
cases fruits show clearly marked sections of two or more distinct 
strains. For instance, examples have been found of oranges show- 
ing unmistakable Washington sections, with the remainder of the 
fruits showing the Thomson strain; again, a section possesses Golden 
Nugget characteristics, while the remainder is the Washington 
strain to all appearances. In a few cases parts of individual fruits 
have been observed which are unlike any known strains of the variety, 
an example of which is shown in Plate XVIII. As a rule, however, 
in the chimeralike forms studied so far, the variable individual fruit 
sections have been found to resemble some of the important strains 
previously described. 
In the course of these investigations, many fruits having decidedly 
abnormal shapes or structures have been observed. For instance, 
twin oranges or those made up of two almost complete fruits with but 
a single calyx have been found. Other fruits have been seen which 
have resembled lemons externally to such an extent that persons 
not knowing of their occurrence on orange trees have thought them 
to be lemons. In a few fruits the navel has been found to be devel- 
oped as a complete secondary orange outside of the primary fruit. 
Some fruits have been found with a loose rind, like that of the tan- 
gerine. A number of oranges have been observed without any 
apparent navel development but otherwise similar to Washington 
Navel fruits. A long list of similar cases might be cited, but in the 
light of our present knowledge of this subject they are apparently 
of little significance or importance to these investigations. Illus- 
trations of some of these abnormal forms are shown in Plate XIX. 
Some of the trees in the performance-record plats have shown 
but few or none of these minor fruit variations. Other trees have 
been prolific in the production of such abnormal fruits and these 
have not been used as sources of bud wood for propagation except 
for experimental purposes. 
LESSONS TAUGHT BY THESE INVESTIGATIONS. 
The performance-record data presented in this bulletin constitute 
but a small part of the records secured in these investigations of the 
Washington Navel orange. The data shown here have been limited 
