24 BULLETIN 623, IT. S. DEPARTMENT OF AGRICULTURE. 
rag is of medium quantity and the juice fairly abundant and of fair 
quality. The fruits are seedless and have navels of ordinary size. 
The flattened shape of these fruits makes them poorly adapted for 
packing under prevailing conditions; otherwise, this strain is equally 
as good as the Washington strain in commercial quality. It occurs 
as single fruit and limb variations in Washington, Thomson, and 
other trees and as individual trees. 
DRY STRAIN. 
In addition to the 13 strains described above, one other, the Dry 
strain, might be added to this list. The trees show a finely branched 
arrangement, somewhat resembling that of the Unproductive strain. 
The habit of growth of the trees is erect and the foliage is dense, with 
small sharply pointed leaves. 
The fruits, illustrations of which are shown in Plate XIV, usually 
are globular or oblong and of small to medium size; the rinds are very 
thick and very coarse in texture and usually are yellowish orange 
in color. The rag is abundant and coarse, and the juice is very 
scant, often hardly enough to measure, and of very inferior quality. 
The fruits are seedless and the navels usually medium to large. 
This strain has been found to occur in some orchards as individual 
fruit and limb sports in trees of the Washington strain. In some few 
cases under observation a considerable proportion of the trees in 
the orchards are of this strain, making the crop as a whole of very 
inferior commercial value. 
INDIVIDUAL FRUIT VARIATIONS. 
The individual fruit variations found in the trees of the Wash- 
ington or other strains are of fundamental importance in consider- 
ing the origin of the various strains under prevailing conditions. 
In the first performance-record work with Washington strain trees, 
it was found during the process of assorting the fruits that occasion- 
ally one or more fruits, very distinct and different from the Washing- 
ton strain, such as those of the Golden Nugget, Australian, or Thom- 
son strain, occurred in the crop. This condition led to a careful 
study of the occurrence of these fruit variations in trees of the Wash- 
ington and other strains before picking. It was soon found that 
these individual fruit variations, such as a Golden Nugget in a Wash- 
ington strain tree, corresponded in all particulars to the fruits borne 
by Golden Nugget trees in the orchards in which the performance- 
record plats were located. 
One of the first and most important individual fruit variations 
observed in Washington strain trees in 1910 in one of the performance- 
record plats was an Australian fruit. Shortly after the discovery 
of this single variation in the crop of a Washington performance- 
record tree, a limb in a near-by Washington tree was found to bear 
