So LABORATORY PRACTICE CHAP. VIII 



3. Adventitious buds appear upon the older stems of many 

 plants after they have been injured. 



XIII. Examine the plumule of a well-soaked Bean. It is 

 the first bud. 



XIV. Classification of Buds. 



POSITION. COVERINGS. CONTENTS. 



Terminal. scaly. leaf. 



axillar y- naked, flower. 



Lateral. 

 Adventitious. 



accessory. 



f superposed. 

 \ collateral. 



mixed. 



XV. Questions about Buds. 



1. What is a bud? 



2. What is the difference between an ordinary vegetative 



bud and a winter bud ? 



3. How do we classify buds as regards their positions on 



the stem? 



4. As regards their coverings ? 



5. As regards their contents ? 



6. What are bud-scales homologous with ? Explain several 



cases. 



7. What do buds develop into ? 



8. How may we tell this year, how many buds (and branches 



if they all develop) will be provided for next year ? 



9. What is the axil of a leaf? 



10. How may we tell a branch-structure from a leaf-struc- 



ture by attending to its position in connection with 

 the axil ? 



11. What are adventitious buds? 



12. Where may they occur? 



13. What is the purpose of the accessory buds in the But- 



ternut ? In the Maple ? 



