Tilossom Hosts and Insect Guests 



stamens in one organ, called the column (Fig. 2), 

 the stigma and the pollen being thus disposed 



upon a single common 

 stalk. The contrast to 

 the ordinary flower will 

 be readily appreciated 

 by a comparison of the 

 diagrams of Fig. i. 



When, therefore, we 

 find a blossom with the 

 anthers or pollen recep- 

 tacle united to a stalk 

 upon which the stigma is 

 also placed, we have an 

 Fig. 3. orchid. 



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