258 Bateson— The Effect of Cross- Fertilization 
locality when young and grown in pots. One of them was 
netted, and several flowers on it were cross-fertilized as soon 
as they were open with pollen from one of the other plants. 
The flowers are not easy to cross, as they are very minute, 
and the petals are nearly closed over the stigma. Flowers of 
the same age as the crossed ones were marked for self- 
fertilization. The seeds of the two lots germinated simul- 
Table II. — Capsella Bursa-pastoris. 
In their original order. 
In order of magnitude in 
a single series. 
A 
B 
c 
D 
E 
F 
Crossed 
Self-fert. 
Crossed 
Self-fert. 
Difference 
inches. 
inches. 
inches. 
inches. 
inches. 
Potl 
I4§ 
Si 
0 8 
r 5t 
18 
+ 2# 
Pot II 
15! 
1 6 
*51 
16 # 
+ I| 
!3 
i6± 
14 J 
16 
+ ii 
Pot III 
I4l 
Ml 
i4l 
14# 
+ i 
Pot IV 
I5I- 
9f 
14 J 
r 3# 
4 
8 
• 
i4i 
18 
13 ! 
*3 
6 
8 
Pot V 
I 3 i 
13 
1 si- 
I2| 
7 * 
8 
i3f 
I3l 
13 
9f 
“3i 
I2|- 
I2| 
12 # 
8# 
-4 
Total in inches. 
1 2 6§- 
I22j 
taneously, and were planted out on the opposite sides of pots. 
The self-fertilized plants exceeded the crossed in height at 
first ; but at the last measurement the crossed slightly ex- 
ceeded the self-fertilized plants in total height. The relation 
of crossed to self-fertilized plants shown in the totals on the 
table is as 100 to 96, so that there cannot be said to be more 
than a very trifling difference in height. By weight, however, 
