LABORATORY AND FIELD 

 MANUAL OF BOTANY 



BY 



JOSEPH Y. BERGEN, A.M. 



Author of " Elements of Botany," " Foundations of Botany, 

 " Primer of Darwinism," etc. ' 



AND 



BRADLEY M. DAVIS, Ph.D. 



Professob of Botany in the University of Pknnsvt >v axta 



GINN AND COMPANY 



BOSTON • NEW YORK • CHICAGO • LONDON 

 ATLANTA • DALLAS • COLUMBUS • SAN FRANCLSCO 



