V1U CONTENTS. 



Rhizoma or Rootstoek 106 



Tuber 107 



Corm 108 



Bulbs and Bulblets 109 



Consolidated Forms of Vegetation 110 



Sect. IV. Tiik Internal Structure of thk Stem . Ill 



Skct. V. Thk Endogenous or Monocotyledonous Stem 114 



Sect. VI. The Exogenous or Dicotyledonous Stem 116 



The First Year's Growth 118 



The Wood 119 



The Bark 120 



The Cambium-Layer 122 



Annual Increase of the Wood 123 



Sap-wood and Heart-wood 124 



The Bark ; its particular Structure 1 26 



The Living Parts of a Tree, &c 129 



The Plant a Composite Being, Individuality . . .131 



Comparison of Endogenous with Exogenous Structure . 132 



CHAPTER V. — OF THE LEAVES 133 



Sect. I. Their Arrangement 133 



Phyllotaxis 133 



Vernation or Prajfoliation 143 



Sect. II. Their Structure and Conformation . .145 



Anatomy of the Leaf • 145 



Stomata 150 



Development of Leaves • 153 



The Venation and Forms of Leaves 154 



Compound Leaves 163 



Leaves of Peculiar Conformation or Transformation . . 165 



The Petiole or Leafstalk, Phyllodia, Stipules . . . 170 



Sect. III. The Duration of Leaves; their Action, etc. 172 



Fall of the Leaf 173 



Death of the Leaf 1 74 



Exhalation from the Leaves, Rise of the Sap . . . 175 



