TABLE OF CONTENTS. 



PACK 



CHAPTER i. F. E. Weiss i 



GENERAL FEATURES OF PLANT LIFE. 



Nutrition and propagation, vegetative and seed reproduc- 

 tion. Annuals, biennials, and perennials. General account 

 of vegetative organs. 



CHAPTER 2. F. E. Weiss g 



ROOTS AND ROOT NUTRITION. 



Absorption by roots and root pressure. Physical and 

 chemical nature of soil. Manures and their importance. 

 Bacteria in soil. Root tubercles of Leguminous Plants. 

 Rotation of crops. Trenching and ridging. 



CHAPTER 3. F. E. Weiss 17 



STEMS AND LEAVES. 



Mechanical requirements of stems and branches. Twin- 

 ing and climbing plants. The food conducting function of 

 stems. The work of leaves and their structure. The wilting 

 and recovery of leaves. Protection of leaves against exces- 

 sive drought. Direct effect of surroundings on leaf develop- 

 ment. Hardening off plants. 



CHAPTER 4. - F. E. Weiss 25 



METHODS OF VEGETATIVE REPRODUCTION AND PROPAGATION. 



Tubers. Bulbs and corms. Bulbils. Runners. Layer- 

 ings and cuttings. Budding and grafting. 



CHAPTER 5. F. E. Weiss 33 



FLOWERS AND THEIR FORMATION. 



Conditions favouring the production of flowers. Structure 

 and functions of the various parts of a flower. Pollination 

 and Fertilisation. Self-fertile and self-sterile flowers. 

 Ripening of fruits and seeds. 



CHAPTER 6. F. E. Weiss 41 



SEEDS AND SEEDLINGS. 



Vitality and longevity of seeds. Conditions favouring 

 germination. Seedlings. Variation. Natural and artificial 

 selection. Sports or mutations. Hybrids and the laws of 

 heredity. 



