1902.] 



I. H. Burkill — Fhnver of Ranunculus arveusis. 



117 



Now it comes about from this tendency of stamens to gain below 

 20 in percentage at the expense of the petals, and from the tendency of 

 the carpels above 20 to show satiety, that the excess of stamens over 

 carpels is likely to be least at 20 and greater both above and below 

 tliat number. Thus is the sex- proportion continually shifting along 

 our curves. 



Half staminodal petals were found in flowers of the Kew race as 

 follows ; it will be noticed tliat towjirds the end of the flowering period 

 they appeared but one at a time in the flowers. 



Table XXVIIL—Half Staminodal fetah. 





Period 1 



2 

 30 



3 

 20 



4 





^ Nnmber 



7 



19 



Kew, Old 



... j In flowers ... 



3 



23 



18 



19 





( Percentage ... 



•47 



•76 



•79 



•75 





C Number 



9 



16 



U 



14 



Kew, New 



... \ In flowers ... 



5 



•63 



11 



14 





(. Percentage ... 



•72 



•63 



•61 



•85 



Lastly I have an abnormality to notice ; it consists of a lobing of 

 the petals, one lobe being laiger than the other. I found this abnor- 

 mality in the Kew race to be fairly frequent and further I found it 

 to be most abundant when the number of staminodes was highest. 



Table XXIX. — Lohed petals. 





Period 1 



2 



3 



4 



C Number 

 Kew, Old ... j In flowers ... 

 C. Percentagfe ... 



10 



2 



•605 



30 



17 



•756 



21 

 16 



•839 



19 



9 



•753 



f Number 

 KeW; New ... < In flowers ... 

 (. Percentage ... 



5 

 3 



•399 



17 



16 



•674 



13 



13 



•721 



7 



6 



•427 



