60 LABORATORY PRACTICE CHAP. XI 



3. What sort of plant-structures are the " eyes " of the 



Potato? Why? 



4. At what point was the Potato attached to the rest of the 



plant ? 



5. Make a sketch of the Potato. 



6. Is the Potato stem, root, or leaf? 



7. Write down your answer and give your reasons for it. 



8. The Potato is a good example of a tuber. Write down 



the best definition for a tuber which you can find. 



V. Examine the conn or solid' btilb of a Gladiolus or 

 Brodisea and notice : 



1. The general shape, size, and color. 



2. The roots (or remains of them) from the lower surface. 



3. The buds (or leaves and flowers) from the upper surface. 



4. Make a sketch of one corm. 



5. Is the corm situated above or below the surface of the 



ground during the life of the plant ? 



VI. Cut the corm into two longitudinal halves. Examine 

 one of the cut surfaces and notice : 



1. The thin outer skin, separate from 



2. The solid inner portion. 



3. The buds (or leaves and flower stems) at the upper 



portion. 



4. The roots coming off from the upper portion. 



5. Make a sketch of one of the cut surfaces and label care- 



' fully the different parts. 



6. Is the corm stem, root, or leaf ? 



7. Write down your answer and the reasons for it. 



VII. Take a bulb of some Lily and examine it, noticing : 

 i. The general shape, size, and color. 



