Chap. IV. 



OXALIS SPECIOSA. 



175 





*. 



The pollen-grains from the stamens in the three forms 

 are in their longer diameters as follows : — 



From the longest stamens of short-styled . 



mid-length " " 



longest stamens of mid-styled . 

 shortest " " 



mid -length stamens of long-styled 

 shortest " " 



Divisions of the 

 Micrometer. 



15 to 16 



4 4 



12 M 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, 



Nature of Union. 



Long-styled form, by pollen of longest ) 

 stamens of short-styled. Legitimate > 

 union J 



Long-styled form, by pollen of longest) 

 stamens of mid-styled. Legitimate \ 

 union J 



Long-styled form, by pollen of own-form ) 

 mid-length stamens. Illegitimate union J 



Long-styled form, by pollen of own-form \ 

 shortest sta mens. Illegitimate union . J 



Long-styled form, by pollen of shortest) 

 stamens of mid-styled. Illegitimate > 

 union J 



Long-styled form, by pollen of mid-length ) 



stamens of short-styled. Illegitimate > 

 union . . . J 



Number 



of 

 Flowers 



fertilised. 



19 



9 



11 



12 



Number 



of 



Capsules 



produced. 



15 



3 











Average 



Number of 



Seeds per 



Capsule. 



57.4 



59.0 



42.5 







30.0 





