62 Correlation between Somatic Characters and Fertility 
The Cold Spring Harbor plants presented in a marked degree the peculiarity 
of producing a high percentage of six-loculed fruits. In the St Louis material 
only a very few of these were found ; it seems worth while to consider both types: 
in the Tables, A designates the five-loculed and B the six-loculed fruits. The data 
appear in Tables VI — X*. The means and variabilities are shown for the bracts 
in Table XI, and for number of ovules and seeds in Table XII. The means for the 
total number per fruit are unnecessary since they may be at once obtained from 
those for the individual locules by multiplication. The correlation coefficients are 
laid side by side in Table XIII. 
TABLE XI. 
Constants for Number of Bracts. 
s 
eries of Material 
Mean 
and 
Probable Error 
Standard Deviation 
and 
Probable Error 
Coefficient 
of 
Variation 
Missouri Botanical Garden, 1905 
Missouri Botanical Garden, 1907 
Missouri Botanical Garden, 1908 
Cold Spring Harbor, 1908, A ... 
Cold Spring Harbor, 1908, B ... 
7 -2290 ±-0201 
7-1854 + -0106 
7-0969+ -0135 
7-1731 ± -0152 
7 -4584 +-0258 
•9448+ -0142 
•9130 ±-0075 
•9716+ -0095 
•8870+ -0107 
■9104+ -0183 
13-069 
12- 707 
13- 691 
12-365 
12-207 
TABLE XII. 
Constants for Ovules and Seeds. 
Number ter Loctjle 
Number per 
Fruit 
Series of Material 
Standard 
Standard 
Coefficient 
Mean 
Coefficient 
and 
Deviation and 
of 
Deviation and 
of 
Probable Error 
Probable Error 
Variation 
Probable Error 
Variation 
Missouri Botanical Garden, 1905 
Ovules 
6-4648+ -0085 
•8922+ -0060 
13-800 
3-1776+ -0479 
9-830 
Seeds 
3-9056 ±-0167 
l-7564± -0118 
44-9723 
7 -0506 ± -1063 
36-105 
Missouri Botanical Garden, 1907 
Ovules 
6-4732+ -0041 
•8063 + -0030 
12-456 
3-3035+ -0270 
10-207 
Seeds 
3 -5966 ± -0101 
1-9549 ± -0072 
54-352 
8-4124+ -0689 
46-780 
Missouri Botanical Garden, 1908 
Ovules 
6-4190+ -0044 
•7158+ -0031 
11-151 
2 -8223 ± -0277 
8-793 
Seeds 
4-0617 ± -0115 
1-8566 ±-0081 
45-711 
7-9675 ±-0782 
39-233 
Cold Spring Harbor, 1908, A ... 
Ovules 
7-4220+ -0066 
•8718+ -0047 
11-747 
3-3045+ -0395 
8-905 
Seeds 
4-9547 ± -0131 
1 -7297 ± -0092 
34-910 
6-8514±-0819 
27-656 
Cold Spring Harbor, 1908, B ... 
Ovules 
7-2360+ -0106 
•9170+ -0075 
12-673 
3-9436+ -0791 
9-083 
Seeds 
4-7224 + -0105 
•9108 ± -0075 
19-287 
7 -8900 ± -2239 
27-846 
* Knowing the distribution of the three characters we can calculate the coefficient of correlation 
from tables showing the total ovules and total seeds associated with each class of bracts. The method 
needs no explanation to professional statisticians. A description of the details for the use of biologists 
will be published in the American Naturalist. 
