FOR 
COLLEGES AND UNIVERSITIES 
BY MEMBERS OF THE BOTANICAL STAFF OF 
THE UNIVERSITY OF CHICAGO 
JOHN MERLE COULTER, PH.D. 
PROFESSOR OF PLANT MORPHOLOGY 
CHARLES REID BARNES, PH.D. 
LATE PROFESSOR OF PLANT PHYSIOLOGY 
HENRY CHANDLER COWLES, PH.D. 
ASSOCIATE PROFESSOR OF PLANT ECOLOGY 
NEW YORK : CINCINNATI : CHICAGO 
AMERICAN BOOK COMPANY 
