a. S. DEPARTMENT OF AGRICULTURE. 



flgC. BOTANICAL DIVISION. 



* SPECIAL 



THE 



OF THE 



UNITED STATES; 



AND SUCH FOREIGN KINDS AS HAVE BEEN INTRODUCED. 



By Dr. GEO. VASEY, (Botanist.;^ 



in 



WITH AN 



APPENDIX 



On the CHEMICAL COMPOSITION OF GRASSES, by CLIFFORD 



KICHAKDSON, and a glossary of terms used 



in describing grasses. 



A NEW, REVISED, AND ENLARGED r 



WITH J14 PI.ATES. 



PUBLISHED BY AUTHOKITY OF THE SECRETARY OF AGRICULTURE. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE 



1889. 



