Pollen-Bearing Pumpkin Blossom 



Many plants bear pollen and ovule on separate 



blossoms, so that self-fertilization is impossible. They are 



said to be dioecious. 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. 



