Chap, hi.] OF VEGETAL OENERATIOIT. 319 



the particle of pollen swells by endosmosis, that its internal 

 membrane forms a hernia filled with favilla (pollinised content), 

 and penetrates thus to the embryonary cells. The fecundation 

 is made by the intense blending of the favilla, and of the contact 

 of the embryonary cell. The fecundated cell always develops 

 itself, and forms by division a mass of spherical cells, whence 

 proceed the cotyledons and the embryon. 



