NUMBER OF STAMENS AND PISTILS IN FICARIA. 



/4 18 20 22 24 26 28 30 32 34- 36 38 40 42 44 46 



FIG. 3. Explanation as in Figs, i and 2. English series. 



tion of the deviation of the number of stamens (or pistils) from 

 their probable value by a formula to be published shortly ('17). 



They are: 



For Bordighera, a z = 2.1873 



For Surrey, a z = 2.8054 



These values make possible the determination of the straight 

 line equations showing the regression of the deviation of the 

 number of stamens and pistils from their probable values upon 

 the total number of sporophylls. They are: 



For Bordighera series Z s - + 5.2446 -- .1181 6 1 



Z p = - 5.2446 -f :n8i 5 



For Surrey series Z s = + 6.6565 -- .11795 



Z p = - 6.6565 + .11795 



Here Z s and Z p denote the deviations of the stamens and pistils 

 from their probable values and S denotes the total number of 

 sporophylls. 



