INTRODUCTION TO EMBRYOLOGY OF ANGIOSPERMS 



In this connection it is interesting to recall the words of the famous 

 anatomist Hugo von Mohl, who, in 1863, at the time of Amici's 

 death, wrote as follows: "Now that we know Schleiden's doctrine to 

 have been an illusion, it is instructive, although sad, to look back to 



D 



E 



B C 



Ovules and embryo sacs of Monotropa hypopitys, before and after fertili- 



A 



Fig. 5. 



zation. A,B, embryo sacs at time of fertilization. C, same, showing pollen tube 

 about to enter micropyle. D,E, Fertilized embryo sacs, showing early stages in 

 formation of endosperm. (After Hofmeister, 1849.) 



the past and see how readily the false was accepted for the true; 

 how some, renouncing all observation of their own, dressed up the 

 phantom in theoretical principles; how others, with microscope in 

 hand, but blinded by their preconceptions, believed that they saw 

 what they could not have seen and sought to establish the correct- 

 ness of Schleiden's notions with the aid of hundreds of figures which 



