HISTORY OF A TWIG 



57 



127. A mangled or broken plant tends to regain its former 

 position. From fallen trees, upright shoots arise. In Fig. 

 95 observe the new trunks arising from the older prostrate 

 trunks. 



98. May 20. 



REVIEW. What is meant by the statement that every twig has 

 a history? Upon what does the shape and size of a branch depend? 

 Explain what you mean by the struggle for existence. Why do not all 

 buds grow? If buds are arranged in mathematical order, why are not 

 branches so arranged? How may the effect of struggle for existence be 

 expressed in figures? Choose some branch and explain. Define dormant 

 buds. Adventitious buds. Why are branches in tiers, or borne at 

 intervals? How do plants tend to regain their form and position, when 

 injured? 



NOTE. Let the pupil work out the history of some branch. It is 

 better to choose a branch that is vigorous. He should first determine, 

 if the shoot is dormant, how much grew the previous season. The 

 last year's growth bears buds on the main axis, not on side branches; 



