16 J. ARTHUR HARRIS. 



IV. RECAPITULATION. 



The present study deals with the problem of the relationship 

 between the total number of sporophylls laid down and the 

 relative number of stamens and pistils in the ranunculaceous 

 genus Ficaria. 



Constants have been deduced for eight series of published 

 data from Italy, Switzerland, Belgium, Guernsey and England 

 not hitherto analyzed by the methods now available. 



In flowers with larger numbers of sporophylls the pistils are 

 relatively more numerous than the stamens. The high degree 

 of consistency of the results drawn from such a wide range of 

 habitats indicates that the relationship is one of real morpho- 

 genetic significance. 



In an earlier paper it has been shown that in Arisarum the 

 relative number of pistillate flowers increases as the total number 

 of flowers becomes larger. 



It is at least suggestive in relation to the problem of the 

 physiology of sex that in both of these very different forms the 

 number of macros porophy 11s becomes relatively larger as the 

 total number of sporophylls increases. The relationships may, 

 however, have an embryological explanation. Only further 

 investigations will justify final conclusions concerning the cause 

 of the relationship demonstrated. 



REFERENCES. 

 Harris, J. Arthur. 



'09 The Correlation between a Variable and the Deviation of a Dependent 



Variable from its Probable Value. Biometrika, VI., pp. 438-443. 

 Harris, J. Arthur. 



'16 On the Distribution and Correlation of the Sexes (Staminate and Pistillate 

 Flowers) in the Inflorescence of Arisarum vulgare and Arisarum probosci- 

 dium. Bull. Torr. Bot. Club, XLII., pp. 663-673. 

 Harris, J. Arthur. 



'17 Further Illustrations of the Applicability of a Coefficient Measuring the 

 Correlation between a Variable and the Deviation of a Dependent Variable 

 from its Probable Value. Shortly. 

 Lee, A. 



'02 Dr. Ludwig on Variation and Correlation in Ficaria. Biometrika, I., 



pp. 316-319, 1902. 

 Ludwig, F. 



'01 Variationsstatistische Probleme und Materialen. Biometrika, I., pp. 

 11-29. 



