stem, or some other similar object, be gently pushed 

 down between the standard and the keel in such a way • 

 that the latter is pressed backwards, the strain will 

 disunite the two petals of the keel. As soon as the 

 restraining force of the united keel petals is removed 

 the pistil and the staminal column instantly spring 

 into the new position up against the standard. The 

 flower is now "trlijped". V/hen the flov/ers are 

 tripped by honey-gathering insects both anthers and 

 stigma usually come into contact 7i/ith the body of the 

 insect during the process. As the pollen adheres to 

 different portions of the insect, there is abundant 

 opportunity for the flowers to become cross-fertilized 

 with pollen from the flowers of other plants. 



- 5 



