10 BULLETIN 624, U. S. DEPARTMENT OF AGRICULTURE. 
The typical fruits, as shown in Plate V, are globular; size small; 
texture very smooth; color deep yellow; rind very thin; rag very 
tender; juice abundant, very sweet; seeds averaging 1 per fruit. 
Frequently the skins of these fruits have small spots or streaks of 
red, as is the case with the fruits of the Yellow strain of the Wash- 
ington Navel orange. On account of the small size and yellow color 
of the fruits, they are inferior to fruits of the Valencia strain for 
commercial purposes under prevailing conditions. These fruits 
usually ripen about one month earlier than those of the Valencia 
strain, and for this reason may prove to be of value for some climatic 
and soil conditions. They are very frequently found as limb sports 
in trees of the Valencia or other strains. 
SMOOTH STRAIN. 
The trees of the Smooth strain are much less productive than 
those of the Valencia strain, and have an upright, spreading habit 
of growth. The foliage and other tree characteristics are similar 
to those of trees of the Valencia strain. 
The fruits, illustrations of which are shown in Plate VI, are usually 
somewhat smaller than the fruits of the Valencia strain, but have 
about the same shape; texture of skin very smooth, resembling in 
appearance that of fruits of the Smooth strain of the Washington 
Navel orange; color reddish orange; rind very thin; rag tender; 
juice abundant, sweet; seeds averaging 2 or 3 per fruit. This strain 
is promising as a valuable addition to the orange strains in Cali- 
fornia when isolated and improved by bud selection. It is fre- 
quently found as a limb sport in trees of the Valencia strain. 
BARREN STRAIN. 
The trees of the Barren strain show more than ordinary vegetative 
vigor, are very unproductive, and have a drooping habit of growth 
and very finely branched, dense f oliage. The leaves are usually small, 
narrow, and very sharply pointed. One interesting condition of 
tree behavior in this strain is the tendency to produce an unusually 
large number of flowers during the blooming period. 
The typical fruits occasionally produced by some trees of this 
strain, as shown in Plate VII, are flattened in shape, usually with 
a wrinkled appearance around the stem; size small; texture coarse; 
color yellowish orange; rind very thick; rag excessive, tough; juice 
scant, of very inferior quality; seeds averaging 1 or 2 per fruit. On 
account of its low production and the inferior commercial quality 
of its fruits, this strain is absolutely worthless. It is occasionally 
found as a linib sport in trees of the Valencia strain. 
