632 



Harris, Correlation in the Inflorescence of Sanguinaria. 



in the neighborhood of 800. This would be the expected condition 

 from the high percentage of seeds which develop, and is of interest 

 chiefly in comparison with the results from other species. A con- 

 stant showing the relationship between the number of ovules per 

 fruit and the capacity of the fruit for maturing its seeds, gives 

 discordant results for the two series of material, thus leaving it 

 still an open question whether there is any difference in the capa- 

 city of the pods for maturing their ovules into seeds depending 

 upon the number of ovules which they bear. 



The correlations between the number of ovules formed or the 

 number of seeds developing on the two placentae of the fruit are 

 high. The actual constants are as follows: 



So large correlations between the two sides of the fruit as 

 those for ovules per placenta indicate great symmetry, and so a 

 high degree of perfection in the morphogenetic processes giving rise 

 to the fruit. 



The relationship for ovules is obviously quite independent of 

 that for the other fertility characters, but the converse is not at 

 all true. The number of seeds developing on a placenta is closely 

 correlated with the number of ovules formed and so a correlation 

 between the number of seeds on the two placentae would neces- 

 sarily be found even though there were no physiological relationship 

 between the two placentae. Again we may have recourse to a 

 rather complex partial' correlation formula which removes the in- 

 fluence of the correlation between the numbers of ovules on the 

 two sides upon the correlation for the numbers of seeds for the two 

 sides. Comparing the results for the correlations for seeds we find: 



1906 1907 



Gross Correlation -801 -844 



Influence of correlation for ovules removed -590 -714 



