automatically tripped in large numlbers, whereas during a 

 period earlier in the seaison, as well as during a period 

 following August 22, conditions were unfavorable for the 

 flowers to ■become tripped in this manner. 



Pods and Seed Develo pi ng fro m Untripped blowers . 



Table XIV shows that five of the 775 flowers observ- 

 ed produced pods, when no evidence that these flowers had 

 been tripped could be found. There is a chance for 

 possible, error, as soife of these flowers ina.y have become 

 tripped without being observed; or the carbon that may 

 have been placed on the calyx may have been removed. 

 However, two of these flowers were observed, in which a 

 jod had begun to develop, and where the tip of the yoimg 

 growing pod pushed through the tip of the keel, while the 

 flower still remained untripped. These tv;o flowers un- 

 doubtedly produced pods v/ithout having been tripped. It 

 is evidently only in rare instances, however, that a pod 

 and seeds develop from an alfalfa flower which had not 

 been tripped in some manner. 



Eff ect _ of _ Tripp_ing_ Alf alf a glowe r s Mechani call3r . 



In 1910, a number of racemes of opened alfalfa flowers 

 on three different plants were clasped between the pages 

 of a notebook. A record was made of the num^ber of flowers 

 that were tripped and which rem.ained untripped, and of the 

 pods and seeds that developed from them.. The pods that 



(40) 



