EXERCISES CONCERNING FRUITS AND SEEDS 91 



me-not is an excellent illustration of this last method. The pod 

 splits suddenly and the parts curl with such force as to throw 

 the seeds out. 



EXERCISES CONCERNING FRUITS AND SEEDS 



1. The Peach, Examine the fruit of the peach. What part of the 

 flower is involved in its make-up? How many carpels does it represent? 

 Note the fleshy exocarp, the hard endocarp and the seed. 



2. Blackberry. Examine the fruits of the blackberry or dewberry 

 What part of the flower? How many carpels? Where are the exo- and 

 endocarps ? 



3. Compare the fruits and tell how the blackberry differs from the 

 raspberry. 



4. Compare the fruits and state how the strawberry differs from the 

 blackberry. 



5. Compare the fruits and state how the mulberry differs from the 

 blackberry. 



6. Apple. Examine the fruit of the apple or pear. What parts of 

 the flower are involved in its make-up? How many pistils and carpels 

 does it represent? How does the endocarp differ from that of the peach? 



7. Gooseberry. Examine the fruit of the gooseberry. What parts 

 of the flower are involved in its make-up ? How many pistils and carpels ? 

 What is the dry part on the tip? 



8. Melon, Orange and Tomato. Cut a melon or cucumber, an 

 orange and a tomato in cross- section. Study in the same manner as the 

 gooseberry. 



9. Seedless Fruits. Cut a navel orange and a banana in cross-sec- 

 tion and study in the same manner. How do they differ? 



10. True Pods. Examine the pod of a bean or pea or similar dry 

 fruit. How many pistils? How many carpels? Where are the seeds 

 attached ? 



11. Examine as many other forms of pods as possible and answer 

 the same questions. 



12. Winged Fruits. Study the seeds of the maple, dandelion, etc., 

 for methods of distribution. 



13. Study the seeds of the milkweed and compare with the dande- 

 lion. 



. 14. Burs. Study burs, stick-tight* and other seeds for special devices 

 for distribution. 



