CONTENTS. 



PAOR 



Urn Mosses 143 



Liverworts, and Scale Mosses . . . 144 

 Lichens . . 145 



Dm 



Fungi, or Mushrooms 146 



Algae, or Seaweeds 147 



Sexual Organs of Flowerless Plants . 148 



SYSTEMATIC BOTANY; OR THE CLASSIFICATION OF PLANTS. 



On the Necessity of Classification . . 149 



Its numerous Difficulties 150 



The LINN.EAN SYSTEM 151 



Tabular Schemes of the Linnjean 



System 152,153 



Class I. Monaadria II. Diandria . 153 



III. Triandria 154 



IV. TetrandriaV. Pentandria . 155 



VI. Hexandria 157 



VII. Heptandria 158 



VIII. Octandria 159 



IX. Enneandria X. Decandria 160 



XT. Dodecandria 161 



XII. Icosandria 161 



XIII. Polyandria 162 



^ XIV. Didynamia 163 



XV. Tetradynamia 164 



XVI. Monodelphia 165 



XVII. Diadelphia 166 



XVIII. Polydelphia .... 167 



XIX. Syngenesia 167 



XX. Gynandria 168 



XXI. Moncecia , .169 



Class XXII. Dioecia 171 



XXIII. Polygamia 172 



XXIV. Cryptogamia .... 172 



AlgJB and Fungi 172,173 



Lichens, Mosses, and Ferns . 174, 175 

 Practical Application of the Linnsean 



System 176 



Characteristics of Plants 181 



NATURAL SYSTEM OF PLANTS . . . 183 

 Natural Order, according to Dr. 



Lindley 184 



CLASSES, and their distinguishing 



Characteristics 184 



Class I. Thallogens 185 



II. Acrogens III. Bhizogens . 186 



IV. Endogens 186 



V. Dictyogens 187 



VI. Gymnogens VII. Exogens. 188 



Sub-Class I. Diclinous Exogens . . 188 



II. Hypogynous Exogens . 189 



III. Perigynous Exogens . 190 



IV. Epigynous Exogens . 191 



INDEX, GLOSSAKIAL, EXPLANATORY, and REFERENTIAL 



193 



