THE UNIVERSITY OF NEBRASKA 



DEPARTMENT OF BOTANY / 



Charles E. Bessey, [/ 

 Professor, and Acting State Botanist / 

 Frederic E. Clements, Assistant Instructor / 

 Cornelius L. Shear, Fellow in Botany | 



Edna L. Hyatt, Botanical Artist A * ^ 



LINCOLN, NEBRASKA, U S. A., /f^^ S 189 



fay / 



Ml I' I JjT 



