BIOMETRIC DATA IN CRINUM LONGIFOLIUM. 87 
That the inflorescences with a number of flowers above 
the average produce more than the average number of 
fruits is clear from mere inspection of the tables. That 
the relationship is not a very close one is shown by the 
correlation coefficients for number of flowers and number 
of fruits which are:— 
For 1905, rg = .393 + .041 
For 1906, rg = .305 + .035 
Difference = .088 + .054 
Considering the smallness of the samples, the agreement 
is good. 
The relationship between the two characters is shown 
graphically in Diagram 2, where the two lines are given 
by the straight line regression equations :— 
DIAGRAM II. 
REGRESSION OF NUMBER OF FRUITS MATURING 
ON NUMBER OF FLOWERS FORMED. 
1 L ch 4 i 1 1 1 1 1 1 1 
4 5 6 te 8 9 10 W 12 13 14 15 16 17 18 
1905 series, circles and broken line; 1906 series, solid dots and firm line. 
For 1905, fr—= 2.5912 + .2904 fl. 
For 1906, fr 4.0703 + .2600 fl. 
The lines are apparently a fairly good smoothing of the 
