6 BULLETIN 1483, XL S. DEPARTMENT OF AGRICULTURE 
orchards, entire trees which are wholly of the Unproductive strain 
have been found and studied. 
The performance records of progeny propagations from four un- 
productive 4 limbs in four different parent trees are shown in Table 
2, compared with similar data from a progeny tree propagated from a 
normal Valencia limb in one of the same parent trees, and with addi- 
tional records from another tree propagated from a Valencia tree 
which was entirely normal in character. Figure 1 shows progeny 
tree 12-36 of the Unproductive strain and tree 12-37 of the Valencia.^ 
strain as indicated in Table 2. Figure 2 shows typical fruits from 
these two trees. 
Table 2. — Records of annual production of progeny trees propagated in 1915 
from limb variations of the Unproductive strain of the Valencia orange com- 
pared with records of trees propagated from the normal portion of one of the 
same parent trees and from a near-by normal tree 
[The presence of the normal limb was not noted in the seasons indicated by an asterisk (*). It seems 
probable that part of the fruit produced in these seasons was on the normal limbs, which were fairly large 
when first observed; but all the fruits harvested before the variation in the limbs was noted have been re- 
corded as from the unproductive limbs] 
Source of buds 
Number of fruits produced by progeny trees 
Prog- 
eny 
tree 
No. 
On limbs of the Un- 
productive strain 
On normal limbs 
Remarks concern- 
ing progeny tree 
— M 
— 
N 
as 
CO 
to 
2 
c 
OS 
Si 
OS 
OS 
IN 
CO 
<M 
OS 
1 
to 
s 
"3 
o 
E-< 
10-52 
10-53 
[Unproductive limb 
r in tree No. 130. 
"Unproductive limb 
in tree No. 132. 
'Unproductive limb 
C in tree No. 141. 
[Unproductive limb 
j in tree No. 190. 
Normal limb in tree 
No. 190. 
Normal tree No. 133 
f 7 5 
J 13 22 
12 
7 
6 
4 

2 
1 
1 
3 
2 
8 
14 
7 
7 
25 
10 
8 
7 
2 



: 

o 

92 
80 
141 
28 
145 
97 
50 
■ 
120 
130 
1S2 
78 
153 
133 
71 
19 
68 
(*) 
(*) 
44 
8 
5 
21 
17 
95 
455 
78 
17 
219 
987 
Only one normal 
limb. 
Two normal twigs 
appearing, 1925. 
Only one normal 
limb. 
About three-fourths 
of tree normal. 
10-54 
11-3 
11-20 
la 
1 
f 
■ 9 
I 2 
i; 
25 
38 
1 

8 
4 
1 
(*) 
(*) 
(*) 
(*) 
46 
26 
77 
417 
1 
89 
11-21 
11-22 
12-35 
12-36 
12-37 
(*) 
(*) 


20 

14 
(*) 
10 

133 
241 
5 
(*) 
17 
215 
117 
141 
21 
33 
18 
159 
409 


12 

208 
220 
16 

76 
9 
282 
564 
176 
21 
148 
34 
1,017 
1,551 
productive. 
Only one normal 
limb. 
Only one small 
normal limb. 
Several small nor- 
mal branches. 
Only one small 
normal branch. 
Entire tree normal. 
11-6 
Do. 
i 
The progeny trees which were propagated from the unproductive 
limbs have shown more or less inherent instability. One tree in 
each of two progenies has remained unproductive throughout in 
fruit, foliage, and production characters. In the remaining seven 
progeny trees some of the limbs have been unproductive and some 
of them have developed normal foliage and fruit. In the propaga- 
tions from parent tree Xo. 190, which possessed both unproductive 
and normal branches, the progeny trees of the Unproductive strain 
have each developed branches of both the Unproductive and Valencia 
strains, whereas the progeny tree which was propagated from a 
4 The word " unproductive " is used here and elsewhere in this bulletin in the sense of 
having the characteristics of the Unproductive strain." 
