the keel or from coining into contact with the standard or anj 

 other oToject. For the sake of comparison other flowers 

 on the same plants were tripped "by using a single alfalfa 

 stem for all the flowers on one raceme . Other flowers which 

 had heen tripped naturally were also marked. A nximher of 

 flowers which were untripped at the time when the flowers 

 were inclosed in netting were also marked, Five plants were 

 used in this experiment. The results are presented in Tahle 

 XI. 



Tahle XI. 

 Pods developing from flowers tripped without pistil and 

 stamens coming into contact with any object. 



Percentage 

 Total ITumher of flowers 

 numljer pods developing 

 flowers found pods. 



Standard removed "before 



tripping--- — --------- --------113---- ---16- -------14. 15 



Tripped hy cutting lower 

 part of keel, stigma and 

 pollen remain in tip of keel-- 76 10 ^--13.16 



Plowers tripped with stem 



alfalfa plant---- 120-------53 41.73 



Flowers tripped naturally-- 178 93 52.24 



Plowers not tripped 358- -18 5.02 



Tahle XI shows that when the flowers were tripped with- 

 out bringing the stigma and pollen into contact with any. 



(27) 



