4: 





SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 



oL TiiC. 



CONTRIBUTIONS 



FROM THE 



United States National Herbarium 



Volume XII, Part 3 



TXE&3 OF AMERICAN GRASSES 



. / 



A STUDY OF THE AMERICAN SPECIES OF GRASSES 



DESCRIBED BY LINNAEUS, GRONOVIUS, 



SLOANE, SWARTZ, AND MICHAUX 



By A. S. HITCHCOCK 



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 rit 



erV ^-C?^ 1 " 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 

 1908 



