A SPRING FLORA 





FOR HIGH SCHOOLS 



BY 



HENRY C. COWLES, PH.D. 



ASSOCIATE PROFESSOR OF PLANT ECOLOGY 

 IN THH UNIVERSITY OF CHICAGO 



JOHN G. COULTER, PH.D. 



CRITIC TEACHER OF BIOLOGY 



UNIVERSITY HIGH SCHOOL. NORMAL, ILL. 



AUTHOR OF "PLANT LIFE AND PLANT USES' 



AMERICAN BOOK COMPANY 



NEW YORK CINCINNATI CHICAGO 



