CONTENTS 



PAGR 



V 



NOTE TO THE SIXTH EDITION . . , , 



PREFACE TO THE FIRST EDITION . . , . vii 



INTRODUCTION ..... i 



CHAPTER 1 

 Type I 



THE WALLFLOWER (Cheiranthus Cheiri, L.) 

 I. External Characters 



A. Vegetative Organs 



a. The Shoot ..... 12 

 6. The Root 17 



B. Reproductive Organs 



a. The Flowers . . . . ,18 



b. The Fruit ..... 26 

 II. Internal Structure 



A. The Cells 26 



a. General Structure of the Cell . . 28 



b. Special Contents of Cells ... 33 



. Chlorophyll-Granules . 33 



/3. Starch Granules , . .35 



y. Oil . . ... 37 



S. Proteid Granules . . .38 



c. Cell-Formation . . . .38 



d. Continuity of the Protoplasm . . 40 



e. Protoplasmic Movements . . .41 



ix 



