42 



NORMAL AND EXPERIMENTAL POLLINATION. 



Excision. — The results of the experiments with the various types of 

 mutilation are presented herewith. Flowers with the corolla gone closely 

 resembled old flowers with the petals fallen and were probably mistaken for 

 them (plate 17). Tables 24 to 28 give the results of observations in which 

 25 normal flowers and 5 flowers of each kind of mutilation were used, 

 with the exception of the last, in which the numbers were equal. The 

 period of observation was one hour in all cases but the second. 



Table 25. — Visitors to normal and mutilated flowers. 



Table 26. — Visitors to normal and mutilated flowers. 



