36 BULLETIN 1483, U. S. DEPARTMENT OE ArrRICULTURE 
at Riverside in the summer seasons of 1917 and 1919, respectively. 
The performance records of a number of these trees from the be- 
ginning of their fruiting during the season of 1920-21 to the season 
of 1925-26, inclusive, are presented in this bulletin. 
The progeny-performance records of 12 limb variations which are 
typical of the trees of important economic strains of this variety, 
as well as those of several limbs representing tree variations of minor 
commercial consequence, show that the fruit and foliage characteris- 
tics of the parent-limb variations have been transmitted to their 
progenies through bud propagation. 
The progeny trees which were propagated from the stable or 
uniform limb variations are similar to their parent limbs in all re- 
spects. On the other hand, the j)rogeny trees which were propagated 
from unstable limb variations have produced fruits and foliage 
normal as well as typical of the present limb variation. 
The results of these progeny tests indicate that the mixed stock 
of many established Valencia orange orchards has been due to the 
unintentional cutting of bud wood from limb variations. The trees 
of most, if not all, of the diverse strains of the Valencia orange 
described in this bulletin are inferior to those of the Valencia strain 
from the standpoint of profitable orange culture. Their presence 
in commercial orchards lowers both the quantity and the quality of 
the production and increases the cost of preparing the crop for the 
market, on account of the greater care necessary in assorting and 
packing the fruits. 
Limb variations marked by characteristic foliage differences, in- 
cluding size, shape, and variegated conditions of the leaves, have 
been transmitted to the progeny trees through bud propagation. 
The habit of tree growth of the progeny trees is similar to the 
arrangement of the branching and the condition of the growth of 
their parent limbs. 
Low quantity production, as well as differences in quality and 
appearance of fruit, have been proved to be inherited characters 
transmitted by progeny propagations. 
The progeny propagations of productive normal Valencia trees 
having uniform fruit and foliage characteristics throughout, as 
shown by their performance records for a period of years both 
experimentally and commercially, have shown little variability and 
have produced heavy crops of superior commercial quality. 
The results of these progeny tests, together with observations of 
many commercial propagations, emphasize the importance of care- 
ful bud selection in the propagation of the Valencia orange. 
