294 



MARTIN BORRILL 



Frequency 



cIq* 



^ s 



o 



3- 



l-H fO 



cr cr 

 O 5* 



cr 3. 



> 



OQ 



The results are given below 



Mean Pollen Diameter 



Species 



No. of 

 gatherings 



No. of 

 grains 



Mean 

 Diam. (/x) 



Difference 



Fitzpatrick (1946) 



No. of 



grains 



Mean 

 Diam. (ii) 



G. 



declinata 



41 



766 



4M 





20 



38-9 



G. 



fluitans 



47 



1004 



42-1 



1-0 

 6-2* 



20 



45-1 



G. 



plicata 



43 



752 



48-3 





20 



47-0 



significant at P — 0-05 



