THE ANGIOSPERMAE 1601 



levels, the earlier stages being then omitted, so that in the epicotyl only 

 the superposed arrangement is produced. 



We would like to close by pointing out that the discussion of seedling 

 anatomy well illustrates the value of de Candolle's principle, that the 

 structure of every organ should be interpreted as emerging from the organ 

 which bears it and never as entering into that organ. How many confusions 

 might have been avoided had this always been done ! 



