EXERCISE 48 (Continued) 



3. Characteristic actions of the insects in visiting each kind 

 of flower. 



4. Peculiarities in the form of the flowers which tend to insure 

 pollination. 



5. Any characteristics of the flowers which favor cross- 

 pollination rather than self-pollination. 



References 



BERGEN and CALDWELL Practical Botany, chap. viii. 

 BERGEN and CALDWELL. Introduction to Botany, pp. 137-154. 

 LUBBOCK. Flowers, Fruits, and Leaves, chaps, i and ii. The Macmillan 

 Company. 



[61] 



