CRVPTOGAMOUS PLANTS. 219 



that the fecundations of animals capable of division must 

 also be denied, whilst there are several where the two 

 modes of reproduction are very certain ; 2d, that it is 

 very true that all plants can be reproduced without 

 fecundation, but in most it requires the hand of man to 

 cause this phenomenon ; that therefore all phaneroga- 

 mous plants, which are not either creeping, rooting, or 

 furnished with tubercules, i. e. three-fourths of all known 

 plants, would be deprived of all natural reproduction, if 

 the germs of their flowers were not vivified by fecun- 

 dation. 



It remains then from this observation, that reproduction 

 by unfecundated germs is common to the whole vegetable 

 kingdom, a very remarkable circumstance when com- 

 pared with the animal kingdom ; but that this form of 

 reproduction requires a concurrence of physiological 

 circumstances which are rarely found in the state of 

 nature, and that fecundation is the natural form which 

 replaces it, and thus insures the perpetuation of the 

 species. 



CHAPTER VI. 



OF THE ORGANS OF REPRODUCTION IN CRVPTOGAMOUS 



PLANTS. 



Section I. 



General Considerations. 



As soon as we began to study with any care the 

 structure of the flower and fruit of plants, we imme- 

 diately divided them into two great classes : — Phanero- 



