CONTENTS 
PART I. PLANT MORPHOLOGY. 
CHAPTER I : THE CELL. 
PAGE 
A. Introductory 9 
B. Organized cell-contents 10 
Protoplasm 10 
Nucleus 11 
Plastids 11 
Leucoplastids 12 
Chloroplastids 12 
Chromoplastids 13 
C. Unorganized cell-contents 14 
Starch 14 
Inulin 20 
Sugars 21 
Tannin and tannoids 22 
The alkaloids 23 
The glucosides 24 
The gluco-alkaloids 24 
Coloring principles 24 
Calcium oxalate 25 
Aleurone grains 30 
Mucilages and gums 31 
Oils, resins and associated products 33 
Ferments or enzymes 34 
D. The cell wall 36 
Origin and composition of walls 36 
Kinds of walls 37 
Thickening of w'alls 40 
E. Forms of cells 40 
Parenchyma 41 
Mechanical cells 41 
Collenchyma 42 
Sclerenchyma 42 
Stone cells 42 
Bast fibers 43 
Wood fibers 43 
Conducting cells 44 
Trachete or ducts 44 
