POLLEN-BEARING PUMPKIN 

 BLOSSOM 



Many plants bear pollen and ovule 

 on separate blossoms, so that self-fer- 

 tilization is impossible. This picture 

 shows a pumpkin blossom with the 

 modified and coalesced stamens at its 

 center bearing a quantity of pollen. 

 The insects in visiting the blossom 

 carry the pollen on their bodies or 

 feet and transfer it to other flowers. 



