viii CONTENTS 



PAGE 



Parenchyma 84 



Prosenchyma 84 



Summary of Root and Stem Tissues 86 



CHAPTER VII 

 THE COVERING TISSUES 



General Considerations 87 



Epidermal Tissues 88 



Membranous Tissues 88 



Stomata 89 



Subepidermal Cells 89 



Striations 89 



Beaded Walls 89 



Thickened Epidermal Tissues 92 



Seed and Fruit Epidermis 92 



Plant Hairs or Trichomes 92 



Non-glandular Trichomes 94 



Classification 94 



Glandular Trichomes 99 



Classification 100 



Cork or Periderm . . . 101 



CHAPTER VIII 

 SUPPORTING TISSUES 



General Considerations 104 



Fibrous Tissues 105 



Classification of Fibers 108 



Wood and Bast Fibers 108 



Schlerenchymatic Tissues 108 



Classification of Stone Cells 110 



Colienchymatic Tissues 112 



CHAPTER IX 

 ABSORPTION TISSUES 



General Considerations 113 



Absorption of Water 113 



Root Hairs 



