CHAP. IV. 



OXALIS SPECIOSA. 



175 



The pollen-grains from the stamens in the three forms 

 are in their longer diameters as follows : 



Divisions of the 



From the longest stamens of short-styled . 

 " mid-length " 

 " longest stamens of mid-styled . 

 " shortest " , . 



" mid-length stamens of long-styled 

 " shortest " " 



15 to 16 

 12 " 13 



16 

 11 to 12 



14 



12 



Therefore the extreme difference in diameter is as 

 16 to 11, or as 100 to 69; but as the measurements 

 were taken at different times, they are probably only 

 approximately accurate. The results of my experiments 

 in fertilising the three forms are given in the following 

 table. 



TABLE 29. 

 Oxalis speciosa. 



