ABNORMALITIES IN INFLORESCENCE OF SPIRAEA VANHOUTTEI 629 
The fact that the three collections made from large individuals 
in the spring of 1913 show the same type of frequency distribution as 
30 r 
Table III 
Number of Abnormal Pedicels per Inflorescence in Inflorescences of Various Total 
Numbers of Pedicels 
Total 
Pedicels 
Abnormal Pedicels 
Total 
in Inflo- 
rescence 
I 
2 
3 
4 
5 
6 
7 
8 
9 
10 
II 
12 
3- 5 -. 
6-8... 
I 
9-11... 
I 
I 
2 
12-14. • • 
II 
3 
15 
15-17... 
23 
13 
12 
8 
10 
2 
3 
71 
18-20. . . 
54 
43 
33 
31 
16 
II 
12 
I 
3 
I 
I 
206 
21-23. • • 
70 
38 
37 
31 
24 
17 
19 
8 
5 
3 
4 
2 
258 
24-26. . . 
27 
20 
23 
18 
12 
19 
16 
9 
5 
4 
2 
I 
I 
157 
27-29. . . 
14 
7 
9 
4 
7 
5 
3 
2 
2 
I 
54 
30-32... 
3 
5 
4 
3 
2 
I 
18 
33-35- •• 
36-38... 
2 
I 
— 
I 
Total . . 
203 
132 
120 
95 
71 
55 
54 
19 
II 
12 
7 
5 
I 
785 
the massed materials of 1909 is sufficient proof that the skew distri- 
bution of number of abnormal rays per inflorescence is not due to any 
