"f 



Comparative Anatomy 



of the 



Filz-like Hair-covering of Leaf-organs. 



INAUGURAL DISSERTATION 



FOR 



OBTAINING THE DEGREE OF DOCTOR OF PHILOSOPHY 



presented 



before the Philosophical Faculty 



of the 



TJNIVEESITY OF ZUEIOH 



BY 



emily l. Gregory. 



Bryn Mawr College. Pa. U. S. A. 



^% 



Approved by the Professors 

 Dr. A. Dodel-Port 

 Or. A. Heim. 





ZURICH 



Printed by Ziircher and Furrer 



1886. 



