CONTENTS. XI 



Chap. XV. p_ieE 



Of Articulations and Dehiscences 118 



Chap. XYI. 



Division of Plants by Means of the Elementary Organs . 121 



Chap. XYII. 



Of the general Classification of Compound Organs . . . 124 



BOOK II. 



Of the Fundamental Organs, or the Organic Parts essential 



TO Nutrition 126 



Chap. I. 



Of the Stem of Vascular Plants 127 



Sect. I. Of the Stem in general ib. 



Art. 1. Of the Stem properly so called ib. 



2. Of the Branches 140 



Sect. II. Of the Stems of Exogens or Dicotyledons .... 143 



Art. 1. Of the Central or Woody System 144 



§ 1. General Considerations ib. 



§ 2. Of the central Pith 145 



§ 3. Of the Woody Layers of the Wood and of the Alburnum 154 



§ 4, Of the Medullary Rays 165 



Art. 2. Of the Cortical Body or System 166 



§ 1. General Considerations jb. 



§ 2. Of the Cortical Layers 167 



§ 3. Of the Cellular Envelope 171 



Art.3. Of the Formation of the Branches in Exogenous Stems 173 

 4. Of the Increase of Exogenous Stems in Length and 



Diameter Ij-y 



Sect. III. Of the Stem of Endogens 187 



Art. 1. Of the Stem in general ib 



§ 1. The Stem of Palms Igg 



§ 2. The Stem of the Liliaceae, &c I93 



§ 3. The Stem of the Bananas I97 



§ 4. The Stem of the Graminese 198 



§ 5. The Stem of the Equisetums 200 



§ 6. The Stem of Ferns 201 



§ 7. The Stem of the Lycopodiums ........ 203 



Art. 2. Of the Formation of the Branches in Endogenous Stems 204 



