DIVISION BY ELEMENTARY ORGANS. 121 



regular rupture, which is effected in the line which offers 

 the least resistance : I give to this phenomenon the name 

 of Dehiscence by Rupture (par rupture). The dehis- 

 cences of fruits, termed Loculicidal, Transverse, Basal, 

 &c. are particular cases of this class. I shall revert 

 to the detail of the different kinds of Dehiscence w^hen 

 I speak of Fruits ; but I considered it right to mention 

 them here in a general manner, since all these distinctions 

 are applicable to all hollow and closed organs in their 

 yovmg state ; and we see from what precedes, that dehis- 

 cence is a kind of articulation applied to hollow organs, 

 and that articulation is the dehiscence of elongated 

 ones. 



CHAPTER XVI. 



DIVISION OF PLANTS BY MEANS OF THE ELEMENTARY 



ORGANS. 



We have described in a concise and general manner, 

 not only the elementary organs, but also those, the 

 primary combinations of which are so intimate, that they 

 may be considered as being themselves elementary. It 

 now remains for us to show, in order to conclude this first 

 part of the Organography, how the vegetable kingdom 

 may be divided by means of the elementary organs, and 

 how we shall obtain by it a fundamental division by 

 which we shall see hereafter that all the secondary ones 

 are linked together. 



In this point of view, plants are divided into two great 

 classes, viz., Cellulares (cellulaires), and Vasculares 

 (vasculaires) : the first are composed solely of round 



