A TEXT-BOOK OF 



GRASSES 



WITH ESPECIAL REFERENCE TO 



THE ECONOMIC SPECIES OF THE 



UNITED STATES 



BY 



A. S. HITCHCOCK 



8T8TEMATIC AGROSTOLOGIST, UNITED STATES DEPARTMENT OF AGRICULTURE, 



WASHINGTON, D. C. ; FORMERLY PROFESSOR OF BOTANY IN THE 



KANSAS STATE AGRICULTURAL COLLEGE 



THE MACMILLAN COMPANY 

 1914 



All rights reserved 



