164 



Science of Plant Life 



Bureau of A gricullure, P. I. 

 FIG. 94. Marketing bamboo, Philippine Islands. 



Cornstalks not only furnish food (ensilage) for cattle, but from 

 them is made the packing used inside the armored walls of 

 war vessels. 



PROBLEMS 



1. What tree is most valuable to the natives of the tropics? Why? 



2. Where are the principal forest reserves of the United States located? May 

 trees be lumbered on forest reserves? 



3. What kinds of work are carried on by the United States Forest Service ? 



4. Will twining stems twine about a horizontal wire ? 



5. For your vicinity, make a list of the plants that climb (i) by twining ; (2) by 

 means of tendrils ; (3) by means of roots. 



