CONTENTS. Xi 



CHAPTER XI. — OF THE SEED 320 



Sect. I. Its Structure and Parts 320 



The Nucleus and Albumen 322 



The Embryo 323 



Sect. II. Germination 328 



CHAPTER XII. — OF REPRODUCTION IN CRYPTO- 



GAMOUS OR FLOWERLESS PLANTS . . 330 



CHAPTER XIII. — OF THE SPONTANEOUS MOVEMENTS 



AND VITALITY OF PLANTS .... 340 



Special Directions 341 



Sensible Movements from Irritation .... 345 



Spontaneous or Automatic Movements . . . .347 

 Free Movements of the Spores of Alg£e .... 348 

 Locomotion of Adult Microscopic Plants . . . .349 



PART II. 



SYSTEMATIC BOTANY. 



CHAPTER L — OF THE PRINCIPLES OF CLASSIFICA- 

 TION . 352 



Individuals 352 



Species 354 



Varieties, Races, Hybrids or Cross-breeds .... 355 



Genera 358 



Orders or Families, Classes, &c . 359 



Characters ......... 362 



Binomial Nomenclature 363 



Natural and Artificial Systems 365 



CHAPTER II. — OF THE NATURAL SYSTEM OF BOT- 

 ANY 366 



Sketch of the Classes, &c 369 



Nonaenclature of Orders, Tribes, &c. . . . . 373 



