STRUCTURE OF STEMS 



opposite each, state what types of cells are found 

 in each tissue. 



4. Make a diagram of a stem 4 years old, clearly indi- 

 cating the corresponding years' growth in phloem 

 and in xylem, and showing some medullary rays for 

 each year's growth. This should be a cross-sec- 

 tional diagram, drawn not less than ten centimeters 

 in diameter. 

 F. Comparison of Stem Structure: 



Copy the following table into your note-books and 

 indicate the presence of the characteristics by a 

 cross under the proper heading, and opposite the 

 name of the plant which shows the characteristic. 



