x ii CONTENTS. 



Movements from Irritation . . . t . . 344 



Automatic Movements ....... 345 



Free Movements of Spores 345 



PART II. 



SYSTEMATIC BOTANY. 



CHAPTER I. OF CLASSIFICATION AND ITS PRIN- 

 CIPLES 349 



Individuals and Species ....... 350 



Varieties and Races ....... 351 



Hybrids or Cross-breeds . . . * . . 352 



Genera . 352 



Orders or Families ........ 353 



Suborders, Tribes, &c. 354 



Classes . .354 



Characters 354 



CHAPTER II. OF THE ARTIFICIAL SYSTEM OF 



LINNAEUS 356 



CHAPTER III. OF THE NATURAL SYSTEM . . 361 



CHAPTER IV. ILLUSTRATIONS OF THE NATURAL 



ORDERS 371 



APPENDIX. 



SIGNS AND ABBREVIATIONS ...... 505 



DIRECTIONS FOR COLLECTING AND PRESERVING PLANTS, &c. 506 



INDEX AND GENERAL GLOSSARY OF BOTANICAL TERMS , 508 



