AMERICAN SCIENCE SERIES, DRIEFER COURSK 
THE ESSENTIALS OF 
BOTANY 
BY 
CHARLES E. BESSEY, Pu.D. 
Professor in the University of Nebrasku, formerly Professor in the 
Towa Agricultural College; Associate Ivditor of 
the ‘‘ American Naturalist” 
THIRD EDITION, WITH AN INTRODUCTION ON THE 
GROSS ANATOMY OF FLOWERING PLANTS 
NEW YORK 
HENRY HOLT AND COMPANY 
18 
