CHAP, in.] OF VEGETAL GENERATION. 319 



the particle of pollen swells by endosmosis, that its internal 

 membrane forms a hernia filled with f avilla (pollinised content), 

 and penetrates thus to the embryonary cells. The fecundation 

 is made by the intense blending of the f avilla, 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. 



1,1 It \{ A U V 



UNI VKKSITY OF 



CALIFORNIA. 



X 



