518 
Journal o f Agricultural Research 
Vol. XXIX, No. 10 
ideal in every respect for the rooting of 
cuttings. The soil, although well 
drained, would not, of course, be 
comparable to sand in this respect. 
It was not possible to supply bottom 
heat for the roots or to control atmos¬ 
pheric temperature. A number of 
the cuttings put forth leaves before a 
callus had formed, thus increasing 
transpiration. In view of these condi¬ 
tions the cuttings which did root are 
all the more interesting as examples of 
species or varieties which will root 
under slightly unfavorable environ¬ 
mental conditions. Under proper ex¬ 
perimental conditions it might be 
possible to utilize asexual propagation 
to a far greater extent than is realized 
at present. It is with this thought in 
mind that the writer has submitted 
the data collected, hoping that others 
may continue the study beyond the 
point which has been possible in the 
present experiment. 
After it has been demonstrated that 
a particular form will root readily 
from cuttings, it remains to be shown 
that such a rooted cutting will con¬ 
tinue to develop and grow normally. 
The writer has not been able to con¬ 
tinue the experiment to this stage. It 
is then necessary to select the particular 
form suited to the scion, to the soil, 
and to other environmental conditions. 
The Marianna type is known to root 
from cuttings, but it is open to the 
objection that it suckers freely in 
certain sections of the country. The 
Myrobalan plum is extensively used 
as a stock for different varieties of 
plums and prunes and can be grown 
from cuttings. There are several dif¬ 
ferent types of Myrobalan plums and 
these will hybridize with certain other 
plums. Such hybrid seeds would prob¬ 
ably cause a considerable variation in 
the resulting seedlings. The propaga¬ 
tion of a desirable type of Myrobalan 
plum by asexual means would be a 
practical method of securing uniformity 
and a direct application of the ideas 
which the writer has tried to set forth 
in this paper. It is interesting to note 
that some nurserymen are actually 
doing this in California. It is hoped 
that the data presented in the accom¬ 
panying table may be of some serv¬ 
ice to future investigators. 
Table I. —Showing data for the species and varieties of cuttings which formed 
either roots or a callus a 
Species and varieties 
Source 
Cutting 
No. 
Leaves 
Shoots 
Callus 
Roots 
No 
growth 
Chaenomeles lagenaria cathayensis _ 
Chico_ 
SPI 37954 
3 
3 
Do . 
_do _ 
SPI 46129 
4 
2 
Cydonia oblonga _ . 
do 
SPI 32882 
5 
5 
Do . 
_do. 
SPI 33214 
5 
5 
Ficus carica _ _ __ _ ______ 
_do_ 
PLII 6243 
3 
1 
1 
Archipel 
_do_ 
SPI 18835 
1 
1 
4 
Constantine 
. do ... 
SPI 18874 
1 
1 
4 
Hamari_ ___ 
_ _ .do_ 
SPI 6468 
3 
3 
3 
Maslin No. 20 
_do_ 
2 
1 
3 
Oeil de Perdrix_ 
...do_ 
SPI 18842 
1 
1 
4 
Reculver 
_do_ 
SPI 18868 
2 
2 
3 
•Warren_ _ __ 
_do _ 
SPI 18905 
1 
1 
4 
Xehba. 
_do _ 
SPI 6941 
7 
2 
Prunus amygdalus ______ 
...do _ 
SPI 7398 
5 
5 
Do. 
_do _ 
SPI 26543 
3 
3 
Do__... _ 
_do_ 
SPI 33217 
3 
6 
5 
Prunus sp. Buckthorn almond.. __ 
_do. _ 
SPI 28942 
4 
4 
Prunus persica __ .. _ 
_do_ 
SPI 33219 
7 
1 
Do . 
.. .do. 
SPI 36703 
6 
1 
Do . - _ 
_do_ 
SPI 38469 
4 
4 
Do 
. .do_ 
SPI 40900 
1 
1 
3 
Do__ 
do 
SPI 43130 
10 
4 
Do 
. .do _ 
SPI 43133 
10 
4 
Do . 
_do 
SPI 43289 
10 
4 
Do 
_do_ 
SPI 55564 
8 
8 
3 
Do.. 
do 
SPI 55835 
10 
4 
F 2 Strawberry X Peento 
Davis. 
1-12 
1 
1 
9 
Family Favorite X Kalamazoo_ 
...do_ 
1-4 
1 
1 
9 
Prunus persica nucipersica.. _ 
Chico_ 
SPI 29227 
7 
5 
Do... 
...do_ 
SPI 34685 
10 
4 
Do 
_do__ 
SPI 43141 
11 
3 
1 
Do 
_ .do _ 
SPI 43142 
10 
1 
Do.. 
_do _ ... 
SPI 43144 
9 
7 
Prunus fenzliana _ . 
_do_ 
SPI 35205 
6 
1 
Do...__ 
_do _ 
SPI 43303 
8 
1 
Prunus besseyi ..._. 
Conn_ 
7 
18 
10 
8 
Prunus pumila . _ # 
_do _ 
19 
12 
7 
Do...I_ 
Chico_ 
PIG 19261 
3 
3 
Do. 
Riverside. 
16 
16 
Prunus sp. Gigantic plum ' 
Chico. 
3 
3 
Prunus sp. Discovery plum _ __ 
_do_ 
2 
1 
1 
Prunus sp. Methley 
_do __ . 
SPI 31652 
10 
10 
Prunus sp . 
. .do . . 
SPI 32751 
3 
1 
1 
Prunus sp. (Alpha) ..... 
...do_ 
SPI 43176 
3 
3 
