I 



F. H. WHITEHEAD 



215 



FIG. 1 



ATROVIRENS 



1 1 1 



C , PU M » UUI 



C. SEMI DECAN D RUM 



eoo 800 



lOOO \ZOO 1400 I600 I800 20OO 



SEED SIZE 



If the difference between the two means is greater than twice its standard error then 

 the means are significantly different. 



In groups A and B the standard error of the difference between the means for this 

 character was found to be 2-3 and the actual difference between the means 9-65; since 

 this is greater than twice the standard error the two means are significantly different. 

 Similarly, the standard error of the difference between the means of groups A and G 

 was 246 and the difference between the means 20 09 whilst the standard error of the 

 difference between means of groups B and C was 24 and the actual difference 10-5. In 

 all these groups, then, there is a significant difference in the means for this character. 



It is of interest to note that seed size varies within each capsule according to the 

 position of the seed in the capsule. Distally the seeds tend to be larger than at the 

 proximal end of the capsule. The average of seed size for each capsule shows less 

 variation. 



