NUMBER OF STAMENS AND PISTILS IN FICARIA. 



pistils of Ficaria verna from Trogen and another series of 80 

 countings from Gais, published by Ludwig ('01). Statistical 

 constants for both of these series have been deduced and pub- 

 lished by Dr. Alice Lee ('02). 



3-4. A series of 268 early and 373 late flowers of Ficaria 

 ranunculoides collected by MacLeod ('99) and discussed by 

 W. F. R. Weldon ('01). 



5-8. Four series of Ficaria ranunculoides collected by Galton, 

 Weldon, Pearson ('03) and others in Italy, Guernsey and Eng- 

 land. 



III. PRESENTATION OF DATA. 



The means and variabilities of number of stamens and pistils 

 per flower have been given in the papers cited. The only point 

 which requires discussion in this place is the relative variability 

 of the number of the two types of sporophylls. This is shown 

 in Table I. 



TABLE I. 



RELATIVE VARIABILITIES IN NUMBER OF STAMENS AND NUMBER OF PISTILS IN 



Ficaria.- 



The number of pistils is consistently more variable than the 

 number of stamens. 



Other workers have shown that there is a correlation of medium 

 intensity between the number of stamens and the number of 

 pistils per flower. Their constants, all of which have been 

 rechecked in the course of this work, are shown in Table II. 

 I have also added the linear regression equations showing the 

 rate of increase in mean number of pistils associated with an 

 increase in the number of stamens and the rate of increase in 



