CONTENTS 



PART I 



CHAPTER I.— The Seed Plant Body. 



Principal Parts of the Seed Plant Body — Size and Form of the 

 Seed Plant Body 1-3 



CHAPTER II. — Fundamental Internal Structxjre of Plant Body. 

 Organs'^and Tissues— The Plant Cell— The Cell as a Unit of 

 Structure— The Cell as a Unit of Plant Activity— The Struc- 

 ture of the Plant Cell— The Cell Wall— Plastids— Nucleus- 

 Protoplasm 4-9 



CHAPTER III.— Roots. 



Development of Root Systems — The Work of Roots — Effect 

 of Environment upon Character of Root System — General 

 Characteristics of Roots — Classification of Roots Based upon 

 Their Medium of Growth — Structure of Roots — Root Hairs, 

 the Absorbing Organs of a Plant — Root-hair Zone — Structure 

 of a Root Hair — Effect of E.xternal Factors upon Develop- 

 ment of Root Hairs — ^Length of Life of Roots 10-21 



CHAPTER IV.— Stems. 



Development of Shoot System — Buds— Classification of 

 Buds — Bud Variation — General Characteristics of Stems — 

 How Does a Stem Grow in Length — Classification of Stems 

 Based upon Their Medium of Growth — "Modified" Stems — 

 Structure of Stems — The Young Dicot Stem — Dicot Vas- 

 cular Bundle— Growth in Thickness of Dicot Stem— Monocot 

 Stems— Annual Rings — Bark — The Work of Stems 22-41 



CHAPTER v.— Leaves. 



Development of Leaves — Parts of Leaf — Kinds of Leaves — 

 * Structure of Leaves — The Work of Foliage Leaves 42-47 



CHAPTER VI.— Flowers. 



Parts of Representative Flower — Development of the Flower 

 — Stamens — Mature PoUen ' Grain — Pistil — Ovule — Pollina- 

 tion — Fertilization — Placentation — Symmetry of Flower — 

 Relative Positions of Flower Parts — Union of Flower Parts — 

 Incomplete Flowers — Inflorescence 48-56 



CHAPTER VII.— Fruits, Seed, and Seedlings. 



Development of the Seed — Development of the Fruit — Fruit 

 and Seed Distinguished — Kinds of Fruits — Germination of 



the Seed 57-59 



vii 



