CONTENTS 



velvety appearance of flowers' petals, how it is produced 

 Vascular tissues Monocotyledons Dicotyledons Tissue 

 which forms new cells- The rough bark of trees The age of 

 trees, how it can be estimated Varieties of stem structure 

 Stems and leaf-stalks Structural botany uninteresting 



Pp. 32-57 



CHAPTER III 

 A GREEN LEAF 



All life depends upon the activity of a certain green-coloured 

 substance which is found in the tissues of leaves The 

 structure of a laurel leaf The growing-point of a stem- 

 Variations in leaf structure Chemical analysis of a green 

 leaf Great trees chiefly built up of carbon obtained from 

 the atmosphere by green leaves " Fall " of leaves Plants 

 and animals dependent on each other How leaves purify 

 the air Chlorophyll corpuscles Plants not only supply us 

 with oxygen, but all our food and innumerable home com- 

 forts Canadian woodland and forest Chlorophyll the 

 mainstay of life Enormous quantities of carbon dioxide 

 passed into the atmosphere daily . . . Pp. 58-83 



CHAPTER IV 

 POLLEN, OR FLOWER-DUST 



Sex exists as much amongst plants as animals Male and female 

 flowers of a begonia Functions of coloured portions of 

 flowers Stamens from various flowers Fertilisation of 

 foxglove Microscopic examination of pollen Structure of 

 the pollen-grain Fertilisation Various kinds of pollen 

 Enormous quantity of pollen produced Showers of pollen 

 falling in the streets of towns Marvels of function carried 

 on beyond the range of unaided human vision . Pp. 84-107 



