EXERCISE 35 (Continued) 



Investigate the structure of the bulb by removing the scales 

 one by one, as you did when you studied the bud. In what 

 respects does the bulb resemble a bud ? In what respects does 

 it differ? How does the amount of food stored in the bulb 

 compare with that stored in a bud ? Is the food in the bulb 

 stored in the new shoot or in the scales? 



3. In a similar manner study one of the enlarged roots. 

 Note that while the enlarged part of the carrot, parsnip, etc. is 

 principally root, yet the upper part bears leaves and is there- 

 fore stem. The sweet potato is a root only. 



Compare roots such as these with roots of common annual 

 plants, as ragweed, to secure a notion of the comparative 

 enlargement. 



References 



BERGEN and CALDWELL. Practical Botany, chap. v. 

 BERGEN and CALDWELL. Introduction to Botany, pp. 87-89. 



[43] 



