Vlll CONTENTS 



PAG! 



Structure of the medullary ray cells 142 



Arrangement of the medullary ray cells in the medullary ray . . . 14: 



Latex tubes 142 



Parenchyma .144 



Cortical parenchyma 147 



Pith parenchyma 147 



Leaf parenchyma 150 



Aquatic plant parenchyma 150 



Wood parenchyma , I5C 



Phloem parenchyma I5C 



Palisade parenchyma 150 



CHAPTER VI 



AERATING TISSUE 



Water pores 151 



Stomata 151 



Relation of stomata to the surrounding cells 154 



Lenticels - ... 157 



Intercellular spaces 158 



CHAPTER VII 



SYNTHETIC TISSUE 



Photosynthetic tissue 163 



Glandular tissue 164 



Glandular hairs 164 



Secretion cavities 166 



Schizogenous cavities 1 68 



Lysigenous cavities 168 



Schizo-lysigenous cavities 168 



CHAPTER VIII 

 STORAGE TISSUE 



Storage cells 173 



Storage cavities 176 



Crystal cavities 176 



Mucilage cavities 176 



Latex cavities 176 



Oil cavity 178 



Glandular hairs as storage organs 178 



Storage walls 179 



