New Types of Citrus Fruits for Florida 
Walter T. Swingle. 
Mr. President, Ladies and Gentlemen : 
I had the pleasure of presenting to the 
members of this society at the meeting at 
Daytona last year some of the results of 
the recent work in the breeding of new 
types of citrus fruits. I spent the months 
from March to June last spring in Flor¬ 
ida making hybrids with a view to secur¬ 
ing new types of citrus fruits, some of 
which I shall discuss in this paper. 
The work heretofore done in connec¬ 
tion with the breeding of hardy citrus 
fruits has not been of a character to in¬ 
terest directly the orange growers of cen¬ 
tral and southern peninsular Florida. The 
hybrids between the trifoliata and the 
common orange (citranges, as we call 
them) are not of a type likely to prove a 
success for commercial culture, although 
excellent for home use throughout the 
cotton states, and are of comparatively 
little interest in regions where oranges, 
lemons and limes can be grown. 
I have had the feeling that many of my 
Florida friends, although somewhat in¬ 
terested in the work, have considered that 
it did not directly concern them. I be¬ 
lieve that the results which I shall dis¬ 
cuss today will convince you that there is 
a side of this work which has a direct 
personal interest to every orange grower 
in Florida. 
THREE-QUARTER HYBRIDS. 
Last year I showed the members of this 
society photographs of softie of the hy¬ 
brids obtained by Mr. E. M. Savage the 
year before by crossing the citrange back 
with one of its parents, thereby securing 
hybrids containing 3-4 orange and 1-4 
trifoliata. These citrangors, as we call 
them, show considerable variation, some 
having distinctly trifoliate and others 
entire leaves like the orange. The studies 
made during the past year have convinced 
me that the pollen grains of the citrange 
have a great range of diversity; some be¬ 
ing practically of the orange type and 
others partly trifoliata, consequently the 
Citrangors show almost every type from 
half-blood orange to trifoliate and from 
citrange to practically pure orange, show¬ 
ing only minute traces of trifoliate blood. 
It is obvious that in this way we secure 
hybrids showing all variations of trifol¬ 
iata blood and there can be but little 
doubt that a slight touch of the trifoliata 
would be likely to add an agreeable zest 
to the fruit and besides give additional 
hardiness to the tree. I have secured 
photographs of three or four of the more 
diverse types of Citrangors so that mem¬ 
bers can see something of the extent of 
variation in this type of hybrid. 
