TABLE OF CONTENTS. 



PAGE 



Chapter r. F . E. Weiss i 



General Featl'res of Plant Life. 



Xutrition <aid propagation, vegetative and seed reproduc- 

 tion. Annuals, biennials, and perennials. General account 

 of vegetative orgnns. 



Chapter 2. F . E. Weiss q 



Roots and Root Xutrition. 



Absorption by roots and root pressure. Physical and 

 chemical nature of soil. ^Manures and their importance. 

 i3cictcria m ^oil. Root tubercles of Leguminous Plants. 

 Rotation of crops. Trenching and ridging. 



Chapter 3. F . E. Weiss 17 



Stl:.is and Leaves. 



]\Iechan]cal r ecpjircnients of -terns and branches. Twin- 

 ing and climbing iDlants. The food conducting function of 

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

 and recovery of leaves. Protection of leaves against exces- 

 sive drought. Direct eft'ect of surroundings on leaf develop- 

 ment. Hardening otf plants. 



Chapter 4. F. E. Weiss 25 



Methods of Vegetative Reproduction and Propagation. 



Tubci's. liull;- and corms. Bulbils. Runners. Layer- 

 ings and cuiiings. Budding and grafting. 



Chapter 5. F. E. Weiss 33 



Flowers an'd their Formation. 

 Conditions la\'ouring the production of ilowers. Structure 

 and functions of the wirious parts of a liower. Pollination 

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

 Ripening of fruits and seeds. 



Chapter 6. F. E. Weiss 41 



Seeds an"d Seedlings. 



Vitality and longevity of seeds. Conditions favouring 

 germination. Seedlings. \'ariation. Natural and artificial 

 selection. Sports or mutations. Plybrids and the laws of 

 heredity. 



