The results of these experiments show that 

 when honey gathering insects were excluded from the 

 flowers the usual result Y;as to cause a decided de- 

 crease in the number of pods and seeds formed. The 

 only marked exception to this rule occurred at Chinook, 

 Montana, in 1909, v.hen excluding Insects did not great- 

 ly reduce the numher of pods formed. The reasons why 

 such a comparatively large proportion of the flov/ers, 

 which were enclosed in netting, at Chinook produced pods 

 and seeds will be discussed on page of this report. 



An examination of the preceding table shows 

 that 23.50 per cent of the 5875 flowers which developed 

 under natural conditions produced pods. Of the 4487 

 flowers which were inclosed in netting tents to exclude 

 honey gathering insects only 7.57 per cent produced pods 

 or seed. When the 4100 flov,/ers from -Ahich insects were 

 excluded were artificially tripped the percentage of 

 flov/ers which produced seed was increased to 36.07 per 

 cent. This increase in the number of pods and seeds 

 formed was very marked in each year and at each locality 

 where the experiment was conducted. 



"iThen the flowers were allowed to develop under 

 natural conditions an average number of 3.09 well matured 

 seeds per pod were formed. ".'hen the insects were ex- 

 cluded the number of seeds per pod was reduced to 2.24; 

 and when the flowers were artificially pollinated wi-^h 



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