Chap. IV. 



OXALIS SPECIOSA. 



1Y5 



The pollen-grains from the stamens in the three forms 

 are in their longer diameters as follows : — 



Therefore the extreme difEerence 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. 



