POLLINATION 



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have a tongue of the length to get the nectar. The pollen 

 is carried as in the case of the bean. 



Flowers which are pollinated by wind have no need of 

 color or of odor, but they have pollen which is Light, 

 abundant (for much of it is lost), and easily shed from 

 the anthers. The stigma is feathery, thus offering more 

 surface for the grains of pollen. Grass and corn, as we 

 have seen, are examples of flowers pollinated by the wind. 

 It is an advantage in securing proper pollination for such 

 plants to grow close together. 



LABORATORY STUDY 



Pollination of Flowers. — As soon as flowers come, observe them 

 closely and note which have many insect visitors, and which few or Done. 

 Fill out a report as suggested below and add any points which int< 

 you further. 



224. Cross- and Self-Pollination. — All plants which re- 

 ceive pollen from another plant of the same kind arc said 

 to be cross-pollinated. Darwin found that {»lants which 

 grow from seeds resulting from cross-pollination produce 

 a greater number of seeds and that these seeds have more 

 vigorous embryos than those resulting from self-pollina- 



