8 



INTRODUCTION TO BOTANY 



of corn, wheat, and oats, in the vegetables and fruits, and 

 in the oil of corn and cotton. It must also be noted that 

 many tissues or fibers of great significance such as cotton, 



FIG. 4. A red-oak tree whose roots have lost their anchorage through 

 removal of the soil by water 



Compare the position of the tree with that of the beech and other trees 

 in the background 



hemp, flax, and the timbers of commerce are produced in 

 connection with the ordinary processes by means of which 

 plants manufacture plant foods and use them in their growth. 



